Compiled: 2026-04-16 Purpose: Peer-reviewed methodology paper documenting the evidence-based design process from literature search to feature implementation. Principal Investigator: Paul Fernkopf, The Forge Hut, LLC Product: Ebbi – Science-backed, shame-free daily focus planner for adults with ADHD (iOS)
| # | Full APA Citation | DOI | Ebbi Feature Supported | Finding Summary | Evidence Grade | Codebase/Site Location |
|---|---|---|---|---|---|---|
| 1 | Willcutt, E. G., Doyle, A. E., Nigg, J. T., Faraone, S. V., & Pennington, B. F. (2005). Validity of the executive function theory of attention-deficit/hyperactivity disorder: A meta-analytic review. Biological Psychiatry, 57(11), 1336-1346. | 10.1016/j.biopsych.2005.01.015 | Task initiation / executive dysfunction framing | Meta-analysis confirming executive function deficits as core ADHD mechanism, including task initiation as a significantly impaired domain. | Meta-analysis | research/ADHD-APP-RESEARCH.md; research/break-bank-research.md |
| 2 | Gollwitzer, P. M., & Sheeran, P. (2006). Implementation intentions and goal achievement: A meta-analysis of effects and processes. Advances in Experimental Social Psychology, 38, 69-119. | 10.1016/S0065-2601(06)38002-1 | Task sequencing; Plan -> Focus -> Review core loop | Meta-analysis of 94 studies (N > 8,000). If-then planning produces d = 0.65 (medium-to-large) effect on goal attainment. | Meta-analysis | ScienceView.swift:37-38; ebbi-site/science.html (Article 3); research/break-bank-research.md |
| 3 | Gollwitzer, P. M. (1999). Implementation intentions: Strong effects of simple plans. American Psychologist, 54(7), 493-503. | 10.1037/0003-066X.54.7.493 | If-then planning for reset pre-selection | Foundational paper establishing that simple if-then plans significantly improve goal attainment by automating cue-response links. | Empirical (foundational) | research/naming-research.md |
| 4 | Gawrilow, C., & Gollwitzer, P. M. (2008). Implementation intentions facilitate response inhibition in children with ADHD. Cognitive Therapy and Research, 32(2), 261-280. | 10.1007/s10608-007-9150-1 | Reset Bank design; implementation intentions in ADHD children | If-then planning improved goal attainment in ADHD children with larger effect than controls, compensating for executive function deficit. | Empirical (ADHD-specific) | research/break-bank-research.md; research/break-bank-design-spec-v2.md |
| 5 | Soderlund, G., Sikstrom, S., & Smart, A. (2007). Listen to the noise: Noise is beneficial for cognitive performance in ADHD. Journal of Child Psychology and Psychiatry, 48(8), 840-847. | 10.1111/j.1469-7610.2007.01749.x | Moderate Brain Arousal model; all soundscapes | White noise facilitated cognitive performance in ADHD children while deteriorating performance in controls. Introduced the MBA model. | Empirical (ADHD-specific, foundational) | ScienceView.swift:30-31; ebbi-site/science.html (Article 2); soundscapes/RESEARCH.md |
| 6 | Rausch, V. H., Bauch, E. M., & Bunzeck, N. (2014). White noise improves learning by modulating activity in dopaminergic midbrain regions and right superior temporal sulcus. Journal of Cognitive Neuroscience, 26(7), 1469-1480. | 10.1162/jocn_a_00537 | Stochastic resonance mechanism; ambient noise design | Ambient noise boosts weak neural signals past detection threshold via stochastic resonance in under-aroused brains. | Empirical (neuroimaging) | ebbi-site/science.html (Article 2) |
| 7 | Zheng, Q., Wang, X., Chiu, K. Y., & Shum, K. K. (2022). Time perception deficits in children and adolescents with ADHD: A meta-analysis. Journal of Attention Disorders, 26(2), 267-281. | 10.1177/1087054720978557 | Visible timers; time projection; “done by” estimates | Meta-analysis of 27 studies confirming significant time perception deficits in ADHD across duration estimation, reproduction, and discrimination. | Meta-analysis | ScienceView.swift:44-45; ebbi-site/science.html (Article 4) |
| 8 | Sirois, F. M. (2014). Procrastination and stress: Exploring the role of self-compassion. Self and Identity, 13(2), 128-145. | 10.1080/15298868.2013.763404 | Shame-free UX; no-punishment philosophy | Self-compassion predicts lower procrastination; negative self-judgment increases stress and avoidance behaviors. | Empirical | ScienceView.swift:52; ebbi-site/science.html (Article 5) |
| 9 | Kaplan, R., & Kaplan, S. (1989). The Experience of Nature: A Psychological Perspective. Cambridge University Press. | – | Attention Restoration Theory; nature soundscapes; Reset Bank design | Directed attention fatigues; natural environments restore it through soft fascination. Four ART components: being away, extent, fascination, compatibility. | Theoretical framework (foundational) | ScienceView.swift:58-59; ebbi-site/science.html (Article 6); research/naming-research.md |
| 10 | Kaplan, S. (1995). The restorative benefits of nature: Toward an integrative framework. Journal of Environmental Psychology, 15(3), 169-182. | 10.1016/0272-4944(95)90001-2 | Soft fascination mechanism; reset activity design | Formal articulation of ART mechanism: restoration requires fascination (effortless attention) to let directed attention recover. | Theoretical framework | research/break-bank-research.md; soundscapes/RESEARCH.md |
| 11 | Berto, R. (2014). The role of nature in coping with psycho-physiological stress: A literature review on restorativeness. Sustainability, 6(9), 5541-5564. | 10.3390/su6095541 | Reset variety; activity-type matters for restoration | Restorative potential varies significantly by activity type, confirming that break content matters. | Literature review | research/naming-research.md; research/break-bank-research.md |
| 12 | Kim, S., Park, Y., & Headrick, L. (2022). Daily micro-break activities and next-task performance: The role of recovery experiences and affective states. Journal of Applied Psychology, 107(8), 1409-1424. | 10.1037/apl0001014 | Structured pre-defined resets; break content selection | Microbreak activity type significantly predicted recovery outcomes; relaxation and nature exposure outperformed social or cognitive breaks. | Empirical | research/break-bank-research.md |
| 13 | Zhu, Z., Chen, C., Yang, Y., Chen, J., & Guo, L. (2024). The effect of structured micro-breaks on concentration performance. Discover Sustainability, 5, 74. | 10.1007/s43674-024-00074-6 | Structured timed breaks | 20-second structured breaks after cognitive tasks improved concentration performance vs. unplanned pauses. | Empirical | research/break-bank-research.md |
| 14 | Risko, E. F., & Gilbert, S. J. (2016). Cognitive offloading. Trends in Cognitive Sciences, 20(9), 676-688. | 10.1016/j.tics.2016.07.002 | Task Bank and Reset Bank as cognitive offloading systems | Foundational review: when working memory is strained, offloading to external systems preserves internal resources for primary tasks. | Review (foundational) | research/break-bank-research.md |
| 15 | Rondeel, E., van der Linden, D., &"; Bijleveld, E. (2021). Individual differences in cognitive offloading: A comparison between different measures and a test of their relations to working memory capacity. Frontiers in Psychology, 12, 662862. | PMC8084258 | ADHD users benefit most from offloading | People with lower working memory capacity (characteristic of ADHD) offload more and benefit more from offloading strategies. | Empirical | research/break-bank-research.md |
| 16 | Cognitive offloading meta-analysis (2025). Psychonomic Bulletin & Review. Springer. | 10.3758/s13421-025-01743-8 | Bank features validated for ADHD population | Confirmed cognitive offloading reduces internal cognitive load and improves performance; effect most beneficial when memory is constrained. | Meta-analysis | research/break-bank-research.md |
| 17 | Sonuga-Barke, E. J. S. (2003). The dual pathway model of AD/HD: An elaboration of neuro-developmental characteristics. Neuroscience & Biobehavioral Reviews, 27(7), 593-604. | 10.1016/j.neubiorev.2003.08.001 | Reset Bank variety/rotation; dopaminergic habituation | ADHD brains are prone to habituation due to dopaminergic dysregulation; the reward system rapidly discounts familiar stimuli. | Theoretical/empirical | research/break-bank-research.md |
| 18 | Hupfeld, K. E., Abagis, T. R., & Shah, P. (2019). Living “in the zone”: Hyperfocus in adult ADHD. ADHD Attention Deficit and Hyperactivity Disorders, 11(2), 191-208. | 10.2147/PRBM.S192076 | +5 minute extend button; flexible scheduling | Hyperfocus states can be disrupted by rigid time-based interruptions; flexible vs. rigid scheduling is contested for ADHD. | Empirical (survey-based) | research/break-bank-research.md |
| 19 | Ogut, E., Senol, D., Kadioglu, B., & Candan, B. (2025). The effect of the Pomodoro technique on academic achievement in anatomy education: A meta-analysis. BMC Medical Education, 25, 130. | 10.1186/s12909-025-08001-0 | Structured timed breaks in Plan -> Focus -> Review | Pomodoro technique consistently improved sustained attention and cognitive performance compared to uninterrupted work. | Meta-analysis | ScienceView.swift:23-24; ebbi-site/science.html (Article 1) |
| 20 | Biwer, F., de Bruin, A. B. H., & van Merrienboer, J. J. G. (2023). When is an interruption a rest? How pre-scheduled study breaks affect sustained attention and learning. British Journal of Educational Psychology, 93(3), 729-742. | 10.1111/bjep.12593 | Pre-scheduled breaks outperform self-regulated breaks | Pre-scheduled breaks outperformed self-regulated breaks for both mood and efficiency; students completed similar work in less time. | Empirical | ScienceView.swift:24; ebbi-site/science.html (Article 1) |
| 21 | Ratcliffe, E., Gatersleben, B., & Sowden, P. T. (2013). Bird sounds and their contributions to perceived attention restoration and stress recovery. Journal of Environmental Psychology, 36, 221-228. | 10.1016/j.jenvp.2013.08.004 | Forest soundscape design (bird layer) | Bird sounds strongly associated with perceived attention restoration and stress recovery. Effect held with recorded sounds. | Empirical | ebbi-site/science.html (Article 6) |
| 22 | Alvarsson, J. J., Wiens, S., & Nilsson, M. E. (2010). Stress recovery during exposure to nature sound and environmental noise. International Journal of Environmental Research and Public Health, 7(3), 1036-1046. | 10.3390/ijerph7031036 | Nature soundscape stress recovery | Nature sounds produced 37% faster sympathetic stress recovery compared to noise conditions. | Empirical | ebbi-site/science.html (Article 6) |
| 23 | Gould van Praag, C. D., Garfinkel, S. N., Sparasci, O., Mees, A., Philippides, A. O., Ware, M., … & Critchley, H. D. (2017). Mind-wandering and alterations to default mode network connectivity when listening to naturalistic versus artificial sounds. Scientific Reports, 7, 45273. | 10.1038/srep45273 | Parasympathetic activity claims for nature sounds | Naturalistic sounds associated with increased parasympathetic activity and changes in default mode network connectivity (NOT increased DMN activity). | Empirical (neuroimaging) | ebbi-site/science.html (Article 6) |
| 24 | Rogers, R. D., & Monsell, S. (1995). Costs of a predictable switch between simple cognitive tasks. Journal of Experimental Psychology: General, 124(2), 207-231. | 10.1037/0096-3445.124.2.207 | “Switch a Small Task” reset design | Planned transitions have lower cognitive cost than unplanned ones, supporting pre-selected task switching during resets. | Empirical (foundational) | research/break-bank-design-spec-v2.md |
| 25 | Andrade, J. (2010). What does doodling do? Applied Cognitive Psychology, 24(1), 100-106. | 10.1002/acp.1561 | “Doodle or Scribble” reset | Doodling activates spatial-visual cognitive systems, provides proprioceptive stimulation, and improves memory retention. | Empirical | research/break-bank-design-spec-v2.md |
| 26 | Buckner, R. L., Andrews-Hanna, J. R., & Schacter, D. L. (2008). The brain’s default network: Anatomy, function, and relevance to disease. Annals of the New York Academy of Sciences, 1124, 1-38. | 10.1196/annals.1440.011 | “Drink Something and Do Nothing” reset (DMN) | Default Mode Network activation during quiet rest associated with memory consolidation and creative incubation. | Review | research/break-bank-design-spec-v2.md |
| 27 | Sarkamo, T., Tervaniemi, M., Laitinen, S., Forsblom, A., Soinila, S., Mikkonen, M., … & Hietanen, M. (2008). Music listening enhances cognitive recovery and mood after middle cerebral artery stroke. Brain, 131(3), 866-876. | 10.1093/brain/awn013 | “Music and Eyes Closed” reset | Music listening during rest engages the DMN while providing emotional regulation; passive rest with audio input. | Empirical (clinical) | research/break-bank-design-spec-v2.md |
| 28 | Nigg, J. T., Bruton, A., Kozlowski, M. B., Johnstone, J. M., & Karalunas, S. L. (2024). Systematic review and meta-analysis: Do white noise and pink noise help with attention in ADHD? Journal of the American Academy of Child & Adolescent Psychiatry. PROSPERO CRD42023393992. | – | Overall soundscape evidence base | 13 studies (335 ADHD, 335 controls). ADHD: g = 0.249 (p < 0.0001) benefit. Non-ADHD: g = -0.212 (noise hurt performance). GRADE: Moderate. | Meta-analysis | soundscapes/RESEARCH.md; soundscapes/SCIENCE-CLAIMS.md |
| 29 | Soderlund, G. B. W., Sikstrom, S., Loftesnes, J. M., & Sonuga-Barke, E. J. (2010). The effects of background white noise on memory performance in inattentive school children. Behavioral and Brain Functions, 6, 55. | 10.1186/1744-9081-6-55 | White noise for inattentive ADHD subtype | White noise at 78 dB enhanced recall for inattentive children (F=9.96, p=.003) while impairing attentive children. | Empirical (ADHD-specific) | soundscapes/RESEARCH.md |
| 30 | Helps, S. K., Bamford, S., Sonuga-Barke, E. J. S., & Soderlund, G. B. W. (2014). Different effects of adding white noise on cognitive performance of sub-, normal and super-attentive school children. PLoS One, 9(11), e112768. | 10.1371/journal.pone.0112768 | Inverted-U arousal model | Sub-attentive children improved with noise; super-attentive worsened. Supported MBA model’s inverted-U prediction across 90 children. | Empirical | soundscapes/RESEARCH.md |
| 31 | Baijot, S., Slama, H., Soderlund, G., Dan, B., Deltenre, P., Colin, C., & Deconinck, N. (2016). Neuropsychological and neurophysiological benefits from white noise in children with and without ADHD. Behavioral and Brain Functions, 12, 11. | 10.1186/s12993-016-0095-y | Neurophysiological confirmation of noise benefit | White noise reduced omission errors in ADHD (n=13); EEG showed elevated Nogo P300 amplitudes indicating improved inhibition. | Empirical (EEG) | soundscapes/RESEARCH.md |
| 32 | Soderlund, G. B. W., Bjork, C., & Gustafsson, P. (2016). Comparing auditory noise treatment with stimulant medication on cognitive task performance in children with ADHD: Results from a pilot study. Frontiers in Psychology, 7, 1331. | 10.3389/fpsyg.2016.01331 | White noise comparable to medication (pilot) | White noise benefit LARGER than medication effect (eta-squared 0.467 vs 0.204). PILOT STUDY – explicitly preliminary. | Pilot study | soundscapes/RESEARCH.md |
| 33 | Lin, H.-Y. (2022). The effect of white noise on attentional performance of preschoolers with ADHD symptoms: A randomized controlled crossover study. International Journal of Environmental Research and Public Health, 19(22), 15391. | 10.3390/ijerph192215391 | White noise for ADHD (rigorous RCT design) | 104 preschoolers (52 ADHD, 52 TD), randomized crossover. ADHD: 7 of 11 indicators improved to TD ranges. TD: noise was “not only unhelpful but also a burden.” | RCT (crossover) | soundscapes/RESEARCH.md |
| 34 | Soderlund, G. B. W., et al. (2024). Sensory white noise in clinical ADHD: Who benefits from noise, and who performs worse? Scandinavian Journal of Child and Adolescent Psychiatry and Psychology, 12(1), 92-99. | – | Inattentive vs. hyperactive subtype distinction | Higher inattention: positive noise benefits. Elevated hyperactivity/impulsivity: performed WORSE. r=.64, p<.001 for auditory/visual correlation. | Empirical (ADHD subtype) | soundscapes/RESEARCH.md |
| 35 | Rijmen, J., & Wiersema, J. R. (2024). Auditory white noise and pink noise enhance cognitive performance in adults with and without ADHD traits. Neuropsychologia, 203, 108961. | 10.1016/j.neuropsychologia.2024.108961 | Pink noise evidence; challenge to stochastic resonance mechanism | Pink noise improved reaction time in ADHD-trait adults. 100 Hz pure tone produced same benefit as random noise, suggesting general arousal rather than stochastic resonance. | Empirical | soundscapes/RESEARCH.md |
| 36 | Lu, S.-Y., Huang, Y.-H., & Lin, K.-Y. (2020). Spectral content (colour) of noise exposure affects work efficiency. Noise & Health, 22(104), 19-27. | – | Brown noise indirect evidence; noise color comparison | Red/brown noise outperformed pink and white on psychomotor speed, executive function, and working memory; rated most subjectively pleasant. | Empirical (general population) | soundscapes/RESEARCH.md |
| 37 | Martin-Moratinos, M., Bella-Fernandez, M., & Blasco-Fontecilla, H. (2023). Effects of music on attention-deficit/hyperactivity disorder (ADHD): A systematic review. Journal of Medical Internet Research, 25, e37742. | 10.2196/37742 | Lo-fi soundscape; slow tempo music | 17 studies: slow tempo music brought ADHD performance closest to control levels; fast tempos increased errors. | Systematic review | soundscapes/RESEARCH.md |
| 38 | Saville, P., Kinney, A., Heiderscheit, A., & Himmerich, H. (2025). Exploring the intersection of ADHD and music: A comprehensive review. Behavioral Sciences, 15(1), 65. | 10.3390/bs15010065 | Music listening for ADHD (comprehensive review) | 20 studies, 1,170 participants: music improved math, reading, mood; reduced hyperactivity; music therapy improved inattention and emotional regulation. | Systematic review | soundscapes/RESEARCH.md |
| 39 | Lachance, K.-A., Pelland-Goulet, C., & Gosselin, N. (2025). Listening habits in young adults with ADHD: Insights from background music use during studying. Frontiers in Psychology. | 10.3389/fpsyg.2024.1508181 | ADHD music preferences during cognitive work | 434 young adults (118 ADHD-screened): ADHD group used significantly more background music during studying; both groups preferred relaxing, instrumental, familiar, self-chosen music. | Empirical (survey) | soundscapes/RESEARCH.md |
| 40 | Kiss, L., & Linnell, K. J. (2020). The effect of preferred background music on task-focus in sustained attention. Psychological Research, 85(6), 2313-2325. | 10.1007/s00426-020-01400-6 | Background music reduces mind-wandering | Background music decreased mind-wandering from 27% to 18% during sustained attention tasks. | Empirical | soundscapes/RESEARCH.md |
| 41 | Proverbio, A. M., De Benedetto, F., Ferrari, M. V., & Ferrarini, G. (2018). When listening to rain sounds boosts arithmetic ability. PLoS One, 13(2). | 10.1371/journal.pone.0192296 | Rain soundscape | Rain sounds boosted arithmetic performance compared to silence; extroverts showed greater benefit (consistent with arousal theory). | Empirical | soundscapes/RESEARCH.md |
| 42 | Buxton, R. T., Pearson, A. L., Allou, C., Fristrup, K., & Wittemyer, G. (2021). A synthesis of health benefits of natural sounds and their distribution in national parks. Proceedings of the National Academy of Sciences, 118(14), e2013097118. | 10.1073/pnas.2013097118 | Water sounds (ocean, stream); bird sounds (forest) | Meta-analysis of 36 publications. Health/positive affect: g = 1.63 (184% improvement). Water sounds: largest health effect. Bird sounds: largest stress reduction. | Meta-analysis | soundscapes/RESEARCH.md; soundscapes/SCIENCE-CLAIMS.md |
| 43 | Kuo, F. E., & Taylor, A. F. (2004). A potential natural treatment for attention-deficit/hyperactivity disorder: Evidence from a national study. American Journal of Public Health, 94(9), 1580-1586. | 10.2105/AJPH.94.9.1580 | Nature exposure for ADHD | 452 ADHD families: green outdoor activities reduced ADHD symptoms more than built outdoor or indoor settings, consistent across demographics. | Empirical (large survey) | soundscapes/RESEARCH.md |
| 44 | Mehta, R., Zhu, R., & Cheema, A. (2012). Is noise always bad? Exploring the effects of ambient noise on creative cognition. Journal of Consumer Research, 39(4), 784-799. | 10.1086/665048 | Cafe soundscape; optimal noise level | 70 dB ambient noise enhanced creative performance vs. 50 dB; 85 dB impaired it. Moderate noise induces processing disfluency promoting abstract thinking. | Empirical | soundscapes/RESEARCH.md; soundscapes/SCIENCE-CLAIMS.md |
| 45 | Awada, M., Becerik-Gerber, B., Hoque, S., O’Neill, Z., Pedrielli, G., Wen, J., & Wu, T. (2022). Ten questions concerning occupant health in buildings during normal operations and extreme events including the COVID-19 pandemic. Scientific Reports, 12, 14566. | – | Cafe ambient noise at moderate levels | 45 dB white noise improved sustained attention, accuracy, speed, and creativity (65% vs 51% ambient); 65 dB improved working memory but increased stress. | Empirical | soundscapes/RESEARCH.md |
| 46 | Egeland, J., Aarlien, A. K., & Soderlund, G. (2023). Exploring the beneficial effect of noise on cognitive performance in ADHD. Frontiers in Psychology, 14, 1301771. | 10.3389/fpsyg.2023.1301771 | Noise and ADHD in broader context | Extended evidence on beneficial noise effects in ADHD populations. | Empirical | soundscapes/RESEARCH.md |
| # | Full Reference | Ebbi Feature | Role in Design |
|---|---|---|---|
| B1 | Barkley, R. A. (2012). Executive Functions: What They Are, How They Work, and Why They Evolved. Guilford Press. | Task Bank; externalized-time recommendation; overall EF model | Foundational model framing ADHD as disorder of executive self-regulation; recommendation to externalize time and prospective memory. |
| B2 | Hallowell, E. M., & Ratey, J. J. (2005). Delivered from Distraction. Ballantine Books. | Task initiation understanding; overall ADHD design framework | Classic ADHD practice text; task decomposition as primary clinical intervention. |
| B3 | Hallowell, E. M., & Ratey, J. J. (2021). ADHD 2.0. Ballantine Books. | Updated ADHD framework | Updated understanding of ADHD neuroscience and intervention approaches. |
| B4 | Ratey, J. J. (2008). Spark: The Revolutionary New Science of Exercise and the Brain. Little, Brown and Company. | Movement-based resets; “Body Break” and “Walk Around the Block” | Brief aerobic movement elevates dopamine and norepinephrine – the exact neurotransmitters ADHD medication targets. |
| B5 | Linehan, M. M. (2014). DBT Skills Training Manual (2nd ed.). Guilford Press. | “Cold Water Reset” design | TIPP skill (Temperature, Intense exercise, Paced breathing, Progressive relaxation) adapted for ADHD regulation via mammalian dive response. |
| B6 | Farnell, A. (2010). Designing Sound. MIT Press. | Procedural audio synthesis philosophy | Core thesis: “Sound is a process, not data.” Procedural audio generates sound from physical models rather than recordings. |
| B7 | Zwicker, E., & Fastl, H. (2007). Psychoacoustics: Facts and Models (3rd ed.). Springer. | Grey noise design; equal-loudness contour application | Psychoacoustic science behind perceptually-flat noise (grey noise) vs. spectrally-flat noise (white noise). |
| Reference | Application in Ebbi |
|---|---|
| NICE NG87 – UK ADHD Clinical Guideline | Supports “structured micro-breaks” and “sensory-regulation activities” as evidence-based attention-restoration strategies. Direct precedent for Reset Bank. |
| WCAG COGA – W3C Cognitive Accessibility Guidelines | Persistent navigation for cognitively impaired users; limit navigation choices; don’t rely on recall. Supports persistent tab bar architecture. |
| ISO 226:2023 – Normal Equal-Loudness-Level Contours | Defines the psychoacoustic basis for grey noise implementation. |
| Hagger, M. S., et al. (2016). A multilab preregistered replication of the ego-depletion effect. Perspectives on Psychological Science, 11(4), 546-573. DOI: 10.1177/0956797616654999 | Multi-lab replication failure (23 labs) of Baumeister’s ego depletion. Basis for removing Baumeister et al. (1998) from Ebbi’s citation base. |
| FTC 16 CFR Part 255 – Endorsements and Testimonials | Marketing copy guardrails; FTC compliance for health-adjacent claims. |
| Lumosity FTC Settlement (2016, $2M) | Precedent for brain-training efficacy claims; informs cautious claim language. |
| GDPR Articles 4(5), 6(1), 15-21, 27; Recitals 26, 32 | Pseudonymization standards, legal bases, EU representative requirement. |
| CCPA Section 1798.140(ae)(1)(B) | Mental health data sensitivity classification for behavioral analytics. |
| Apple App Store Guidelines 1.4, 1.4.1, 5.1 | Health-app scrutiny; privacy nutrition label compliance. |
| RevenueCat State of Subscription Apps 2024 & 2026 | Health & Fitness conversion benchmarks, trial optimization data, annual plan dominance (60.6%). |
| Citation | Finding | Feature Impact |
|---|---|---|
| Willcutt et al. (2005) | Task initiation is the most impaired executive function in ADHD | “Just Start” button; single primary CTA; micro-task breakdown |
| Barkley (2012) | ADHD as executive self-regulation disorder; prospective memory failure | Task Bank externalizes prospective memory burden |
| Hallowell & Ratey (2005, 2021) | Task decomposition as primary clinical intervention | Auto-splitting feature; “Slice It” |
| ADHD community language analysis | “I can’t start because it feels too big”; “chunking”; “task paralysis” | Task slicing emotional framing; UX copy |
| Citation | Finding | Feature Impact |
|---|---|---|
| Kaplan & Kaplan (1989); Kaplan (1995) | Attention Restoration Theory: directed attention fatigues; soft fascination restores | Reset Bank activities designed as active, low-demand tasks engaging “soft fascination” |
| Berto (2014) | Restorative potential varies by activity type | 8 starter resets covering different restoration mechanisms (physical, sensory, passive, creative) |
| Kim et al. (2022) | Microbreak activity type predicts recovery; relaxation and nature outperform social/cognitive | Pre-defined, categorized resets (Physical/Mental/Productive) |
| Zhu et al. (2024) | 20-second structured breaks improve concentration vs. unplanned pauses | Structured, pre-defined resets over ad hoc pauses |
| Ogut et al. (2025) | Pomodoro technique improves sustained attention (meta-analysis) | Structured timed work-break intervals in Plan -> Focus -> Review |
| Biwer et al. (2023) | Pre-scheduled breaks outperform self-regulated breaks | Auto-scheduled resets in plan builder |
| NICE NG87 | Endorses structured micro-breaks and sensory-regulation activities | Clinical precedent for Reset Bank |
| Citation | Finding | Feature Impact |
|---|---|---|
| Gollwitzer & Sheeran (2006) | d = 0.65 meta-analytic effect on goal attainment (94 studies, N > 8,000) | Core Plan -> Focus -> Review loop; task sequencing |
| Gollwitzer (1999) | If-then plans create automatic cue-response links | Reset pre-selection as if-then structure |
| Gawrilow & Gollwitzer (2008) | Larger effect in ADHD children than controls | Reset Bank: each reset is named, specific, pre-selected before focus |
| Citation | Finding | Feature Impact |
|---|---|---|
| Soderlund, Sikstrom & Smart (2007) | MBA model: ADHD brains are under-aroused; noise helps | Foundational rationale for all 12 soundscapes |
| Nigg et al. (2024) | Meta-analysis: g = 0.249 for ADHD, g = -0.212 for non-ADHD | Overall evidence base for soundscape feature |
| Soderlund et al. (2010) | White noise at 78 dB enhanced inattentive children | White noise inclusion; volume calibration |
| Lin (2022) | 7/11 ADHD indicators improved to TD ranges with white noise (RCT) | White noise as free-tier sound |
| Baijot et al. (2016) | EEG: elevated P300 amplitudes during noise | Neurophysiological confirmation |
| Soderlund, Bjork & Gustafsson (2016) | Noise benefit larger than medication effect (pilot) | Supporting evidence (noted as preliminary) |
| Soderlund et al. (2024) | Inattentive benefit, hyperactive detriment | Design for primarily inattentive-type users |
| Rijmen & Wiersema (2024) | Pink noise improved ADHD-trait adults; challenges stochastic resonance mechanism | Pink noise inclusion |
| Lu et al. (2020) | Brown/red noise outperformed others on EF tasks; most subjectively pleasant | Brown noise inclusion despite zero direct ADHD studies |
| Rausch, Bauch & Bunzeck (2014) | Stochastic resonance: noise boosts weak neural signals | Mechanism explanation for marketing/science page |
| Martin-Moratinos et al. (2023) | Slow tempo music closest to control performance in ADHD | Lo-fi soundscape at 72 BPM |
| Lachance et al. (2025) | ADHD adults prefer relaxing, instrumental, familiar music | Lo-fi characteristics (Rhodes, jazz, instrumental) |
| Kiss & Linnell (2020) | Background music decreased mind-wandering 27% -> 18% | Lo-fi as focus tool |
| Proverbio et al. (2018) | Rain sounds boosted arithmetic performance vs. silence | Rain soundscape |
| Buxton et al. (2021) | Water sounds: g = 1.63 for health; bird sounds: largest stress reduction | Ocean, stream soundscapes; forest (bird layer) |
| Alvarsson et al. (2010) | Nature sounds: 37% faster stress recovery | Nature soundscapes generally |
| Gould van Praag et al. (2017) | Parasympathetic activity changes with natural sounds | Nature soundscape claims (carefully worded) |
| Kaplan & Kaplan (1989) | ART: natural environments restore directed attention | Forest, rain, ocean soundscapes |
| Ratcliffe et al. (2013) | Bird sounds: strongest restoration and stress recovery | Forest soundscape bird layer |
| Kuo & Taylor (2004) | Green outdoor activities reduced ADHD symptoms | Nature sound as indoor proxy for outdoor benefit |
| Mehta, Zhu & Cheema (2012) | 70 dB ambient enhances creativity; 85 dB impairs | Cafe soundscape; volume targeting |
| Farnell (2010) | Procedural audio from physical models > recordings | SoundscapeEngine.swift architecture |
| ISO 226:2023 | Equal-loudness contours | Grey noise design |
| Citation | Finding | Feature Impact |
|---|---|---|
| Zheng et al. (2022) | Meta-analysis: significant time perception deficits in ADHD children/adolescents | Live time projection; “Done by” estimates; visible countdown timers |
| Barkley (2012) | ADHD as disorder of time management; externalize time | Progress rings; countdown timers; schedule recalculation |
| Citation | Finding | Feature Impact |
|---|---|---|
| Sirois (2014) | Self-compassion reduces procrastination; negative self-judgment increases avoidance | No-punishment philosophy; gentle failure framing |
| ADHD community analysis | “Nothing bad happens if you skip” drives retention | No streak loss; auto-forgive at day boundary |
| Clinical ADHD literature | Rejection Sensitive Dysphoria: perceived failure causes intense emotional pain | “Bad brain day” mode; no “overdue” labels; celebration of partial completion |
| Citation/Source | Finding | Design Decision |
|---|---|---|
| ADHD-APP-RESEARCH.md community analysis | Breakable streaks trigger shame spirals; users abandon apps after streak breaks | Cumulative progress (“15 days this month”) instead of breakable streaks |
| Finch app analysis | “Nothing bad happens if you skip” is key retention mechanism | No dying plants, no broken streaks, no passive-aggressive reminders |
| Tiimo App Store reviews | Complexity and customization overwhelm ADHD users | Simplicity over customization; max 5-7 items visible |
| DOCTRINE.md clinical safety rules | “Rewards must celebrate completion, never punish absence” | Achievement milestones shown once; no obligation to maintain |
| Citation | Finding | Feature Impact |
|---|---|---|
| Willcutt et al. (2005) | Executive function deficits prevent task decomposition | Auto-split: tasks >= 20 min can be sliced with resets between |
| ADHD community language | “I can’t start because it feels too big”; “doom pile” | Task splitting as emotional relief, not automation |
| Competitive analysis | No competitor combines auto-decomposition + personalized resets | Core differentiator |
| Rogers & Monsell (1995) | Planned transitions have lower cognitive cost | Pre-planned split points vs. ad hoc interruption |
| Citation/Source | Finding | Feature Impact |
|---|---|---|
| Zheng et al. (2022) | Time perception deficits in ADHD | Estimate bias tracking (“tasks take 35% longer than planned”) |
| ADHD clinical literature | Underestimation bias is characteristic of ADHD | Schedule recalculation when tasks overrun; adaptive estimates |
| Session-Summary-2026-03-31 | ADHD users need external structure to replace internal EF | Real-time “Done by” projections that update as tasks complete |
| Citation/Source | Finding | Feature Impact |
|---|---|---|
| Clinical ADHD literature | Executive dysfunction varies day to day; some days planning feels impossible | One-tap gentle session with pre-built short tasks |
| Sara persona analysis | “Take it easy today” is warm instruction, not diagnosis | Bed icon, temporary framing (“today”), positioned in emotional space |
| DBT TIPP skill (Linehan) | Regulation interventions must be available when executive function is lowest | Bad Brain Day never gated behind Pro paywall |
| ADHD community | RSD makes “giving up” feel devastating; reframing as “taking it easy” removes shame | Explicit permission-giving infrastructure |
| Citation/Source | Finding | Feature Impact |
|---|---|---|
| Kaplan (1995) ART | Absence of directed-attention demands allows restoration | Silence as intentional choice, not absence of feature |
| ADHD clinical practice | Some ADHD individuals are noise-sensitive (hyperactive subtype) | Silence always available; free tier includes silence |
| Soderlund et al. (2024) | Elevated hyperactivity/impulsivity: performed WORSE with noise | Silence as the appropriate option for noise-sensitive users |
Note: The prompt references Kirste et al. (2013, Brain Structure and Function) regarding silence and neurogenesis. This study (showing that silence led to new cell development in the hippocampus of mice) was not found in Ebbi’s existing research library or codebase. It represents a potential addition to the silence evidence base but was not part of the original literature review and should be independently verified before inclusion. If verified, it would strengthen the case for intentional silence as the 13th soundscape.
The literature review supporting Ebbi’s design was conducted iteratively between March and April 2026. The process was not a single-pass systematic search but rather a criteria-driven iterative review that accompanied product development.
Phase 1 – Foundational Research (Late March 2026)
During the initial Ebbi build session (March 31, 2026), the principal investigator (Paul Fernkopf) directed AI research agents to investigate:
AI agents (Claude Code, OpenClaw multi-agent system) conducted literature searches across PubMed, Google Scholar, PsycINFO, and Cochrane databases. Search results were compiled into topic-specific research documents stored at ~/.openclaw/workspace-private/backups/pre-paco-takeover-20260404/workspace/projects/ebbi/research/ (31 markdown files, 450+ KB of research content).
Phase 2 – Feature-Specific Deep Research (Late March - Early April 2026)
As specific features were designed, targeted literature reviews were conducted:
Phase 3 – Team Deliberation (Early April 2026)
A structured deliberation process using defined role perspectives evaluated design decisions from multiple stakeholder viewpoints:
Meeting transcripts document how conflicting evidence (e.g., rigid vs. flexible scheduling for ADHD) was resolved through structured debate. The April 3 team meeting produced 8 locked decisions, 14 action items, and 8 open questions for the principal investigator.
Phase 4 – Soundscape Research Portfolio (April 2026)
A dedicated literature review was conducted for the soundscape feature, resulting in soundscapes/RESEARCH.md (552 lines) and soundscapes/SCIENCE-CLAIMS.md (207 lines). This review covered:
Phase 5 – Citation Audit (April 2026)
All public-facing citations (ScienceView.swift, ebbi-site/science.html) were audited against primary sources. Seven corrections were identified and applied. One study (Baumeister et al., 1998) was removed after review of multi-lab replication failure (Hagger et al., 2016).
Phase 6 – Research Compilation (April 12, 2026)
Four parallel extraction agents swept the entire project to compile the Ebbi Research Compilation (1,389 lines), consolidating every citation, decision chain, and evidence grade into a single auditable reference.
| Source Category | Count | Description |
|---|---|---|
| Topic-specific research documents | 31 files | In research library backup |
| Soundscape research portfolio | 2 files | RESEARCH.md + SCIENCE-CLAIMS.md |
| Feature design specifications | 5 files | Design specs with embedded citations |
| Team meeting transcripts | 5 files | Full meeting + 4 persona prep docs |
| In-app science cards | 6 cards | ScienceView.swift |
| Public science articles | 6 articles | ebbi-site/science.html |
| Product doctrine | 1 file | DOCTRINE.md (9 domains, 454 lines) |
| Session transcripts | 846+ files | Claude Code .jsonl session logs |
Literature searches were conducted across:
Literature searches employed the following term combinations (reconstructed from session history and research documents):
ADHD Core:
Sound and ADHD:
Break/Restoration:
Design/UX:
Studies were included if they met the following criteria:
Studies were excluded if they met any of the following:
Exception: Community language analysis from r/ADHD, ADDitude Magazine, and TikTok #ADHDTok was used for user experience research (language patterns, pain points, feature naming) but is clearly distinguished from peer-reviewed evidence throughout.
Each citation underwent quality assessment including:
Systematic records of initial screening volume were not maintained; the literature review followed an iterative, criteria-driven process rather than a single-pass systematic search. The iterative approach was necessitated by the concurrent nature of product design and evidence gathering – as new features were conceived, targeted literature reviews were conducted to evaluate their scientific basis. A PRISMA flow diagram is not appropriate for this process.
The total evidence base comprises 46 peer-reviewed primary research articles, 7 books/clinical frameworks, and 13 clinical guidelines/regulatory/industry references, covering ADHD neuroscience, cognitive psychology, psychoacoustics, attention restoration, and health app design.
Literature searches, initial screening, and synthesis were assisted by large language model tools (Claude, Anthropic; Claude Code CLI; OpenClaw multi-agent system). All inclusion/exclusion decisions, quality assessments, and design decisions were made by the principal investigator. AI-identified citations were independently verified against source databases.
Six citation errors introduced during AI-assisted compilation were identified and corrected during a quality audit (see Section 5). One study (Baumeister et al., 1998) was removed after review of replication failures (Hagger et al., 2016). Seven instances of overclaimed or imprecisely attributed findings were corrected to match actual study scope and conclusions.
The principal investigator has ADHD and a reading comprehension disability. AI tools served as an accessibility accommodation, enabling systematic literature search and synthesis that would otherwise require research staff. All final interpretive and design decisions remained with the human investigator.
A structured deliberation process using defined role perspectives (clinical UX, engineering, growth, legal) was used to evaluate design decisions from multiple stakeholder viewpoints. The role perspectives were AI-simulated but followed explicit domain-specific rulesets (documented in DOCTRINE.md) and produced structured outputs (decisions, action items, open questions) that were reviewed and approved by the principal investigator.
Problem: ADHD users struggle with task initiation – not because they don’t know what to do, but because their brain fails to hold the task in working memory long enough to act on it. The “app graveyard” problem: 65% of app cancellations come from “I stopped using it.”
Research Found: Gollwitzer & Sheeran (2006) meta-analysis of 94 studies (N > 8,000) showed that implementation intentions – pre-specifying “when X, I will do Y” – produce d = 0.65 effect on goal attainment. Gawrilow & Gollwitzer (2008) found the effect was LARGER in ADHD children than controls, because implementation intentions compensate for the exact executive function deficit ADHD presents.
Specific Finding That Drove the Decision: Implementation intentions create automatic cue-response links, reducing the need for in-the-moment executive initiation. For ADHD, this is precisely the deficit being bypassed. Pre-deciding task order is the same mechanism as if-then planning.
Design Decision: The core app structure – Plan -> Focus -> Review – is itself an implementation intention. Users pre-specify their exact task sequence. The app then executes it automatically, removing the need for in-the-moment decisions about what to do next.
Implementation: PlanView.swift (task sequencing), SessionView.swift (auto-advancing through pre-planned sequence), PlanStore.swift (schedule builder with projected finish times).
Citations: Gollwitzer & Sheeran (2006); Gawrilow & Gollwitzer (2008); Gollwitzer (1999); Barkley (2012)
Problem: ADHD users either skip breaks entirely (hyperfocus) or take breaks that fail to restore attention (scrolling social media, which depletes rather than restores). When break time arrives, decision fatigue prevents choosing a restorative activity.
Research Found: Kim et al. (2022) showed microbreak activity type significantly predicted recovery outcomes – relaxation and nature exposure outperformed social or cognitive breaks. Kaplan (1995) ART established that restoration requires “soft fascination” (effortless attention), not passive rest. Risko & Gilbert (2016) showed cognitive offloading reduces internal load; Rondeel et al. (2021) showed people with lower working memory capacity (ADHD) benefit most from offloading.
Specific Finding That Drove the Decision: Implementation intentions (Gollwitzer & Sheeran, 2006) combined with cognitive offloading (Risko & Gilbert, 2016): pre-selecting named break activities before the focus session removes mid-session decision fatigue. The break becomes automatic – “when the timer ends, I will [specific activity].”
Competing Finding: Hupfeld et al. (2019) documented that rigid time-based interruptions can disrupt productive hyperfocus. Resolution: the +5 minute “extend” button allows flexibility within the structured framework.
Design Decision: Reset Bank – a persistent collection of named, categorized break activities (Physical, Mental, Productive) that users pre-select before planning. 8 starter resets seeded on first launch, each backed by specific research.
Implementation: BankStore.swift (Reset Bank persistence), BankModels.swift (ResetBankItem with category, icon, duration), PlanView.swift (reset insertion into schedule).
Citations: Gollwitzer & Sheeran (2006); Gawrilow & Gollwitzer (2008); Kim et al. (2022); Kaplan (1995); Risko & Gilbert (2016); Rondeel et al. (2021); Hupfeld et al. (2019); Berto (2014)
Each of the 8 starter resets was designed with specific research justification:
| Reset | Duration | Research Basis | Citation |
|---|---|---|---|
| Walk Around the Block | 5 min | ART: nature-based walking is highest-restoration activity; mild nature exposure + physical movement | Kaplan (1995); Berto (2014) |
| Get Water or a Snack | 2 min | Hydration as sensory anchor; minimal cognitive demand; change of location | Clinical practice |
| Step Outside | 3 min | Nature exposure; ART “being away” component; change of sensory environment | Kaplan & Kaplan (1989); Kuo & Taylor (2004) |
| Switch a Small Task | 5 min | Paul’s original 2009 paper system; novelty provides dopamine; planned transitions have lower cost | Rogers & Monsell (1995) |
| Tidy One Surface | 3 min | Physical movement; completable task provides “done” dopamine hit; different cognitive mode | Ratey (2008) |
| Listen to a Song | 3-4 min | Music engages DMN during rest; emotional regulation; passive (no task demand) | Sarkamo et al. (2008); Martin-Moratinos et al. (2023) |
| Doodle or Sketch | 3-5 min | Spatial-visual processing (different from language/executive); proprioceptive stimulation; memory retention | Andrade (2010) |
| Deep Breathing | 2 min | Parasympathetic activation; mammalian dive response; DBT TIPP adaptation | Linehan (DBT Skills Manual) |
Problem: ADHD brains are chronically under-aroused (dopaminergic system runs at lower baseline), leading to constant stimulus-seeking behavior that manifests as distractibility.
Research Found: Soderlund, Sikstrom & Smart (2007) proposed the Moderate Brain Arousal model: ADHD benefits from external noise because it pushes weak neural signals past detection threshold via stochastic resonance. Nigg et al. (2024) meta-analysis of 13 studies confirmed: g = 0.249 benefit for ADHD, g = -0.212 detriment for non-ADHD. The effect is specific to under-aroused brains.
Specific Finding That Drove the Decision: The ADHD group shows a small but statistically significant benefit from ambient noise (p < 0.0001), while the non-ADHD group is actively harmed. This means ambient sound is not a generic wellness feature – it is a targeted intervention for the specific population Ebbi serves.
Competing/Nuanced Findings: Soderlund et al. (2024) found that children with elevated hyperactivity/impulsivity performed WORSE with noise, while those with higher inattention benefited. Ebbi serves primarily inattentive-type ADHD (focus/planning difficulty), which is the population that benefits most.
Design Decision: 12 soundscapes + silence (13 total), split into free tier (silence, white, brown, rain – strongest evidence or highest demand) and Pro tier (grey, pink, lo-fi, ocean, fireplace, stream, wind, thunderstorm, cafe). Evidence grades transparently rated from Strong (white noise, 12+ studies) to Theoretical (fireplace, wind).
Implementation: SoundscapeEngine.swift (AVAudioEngine with procedural synthesis and file-based playback), FocusModels.swift (Soundscape enum, 12 cases), SoundscapePickerView.swift (in-session picker with Pro gating).
Citations: Soderlund et al. (2007); Nigg et al. (2024); all soundscape citations in Section 2D
Problem: ADHD users have impaired time perception – tasks feel abstract until urgent; duration estimation is systematically inaccurate; “three hours vanished” is a daily experience.
Research Found: Zheng et al. (2022) meta-analysis of 27 studies confirmed significant time perception deficits in ADHD children and adolescents across duration estimation, reproduction, and discrimination. Barkley (2012) framed ADHD partly as a disorder of time management in the neurological sense and recommended: externalize time. Make it visible, audible, unavoidable.
Specific Finding That Drove the Decision: Barkley’s recommendation to externalize time is the design principle. Every screen must make time visible. Progress rings, countdown timers, projected finish times – anything that moves the abstract concept of time into something senses can track.
Design Decision: Live time projection that recalculates in real-time as tasks run over or under; “Done by” estimate visible from plan screen; large countdown timer (56pt monospaced) during focus sessions; weekly bar chart showing patterns.
Implementation: SessionView.swift (countdown timer, progress ring), PlanView.swift (projected finish time), StatsView.swift (weekly bar chart), SessionViewModel (real-time schedule recalculation).
Citations: Zheng et al. (2022); Barkley (2012)
Problem: Most productivity apps use guilt as a motivator (dying plants, broken streaks, red “overdue” labels). For ADHD users, this triggers Rejection Sensitive Dysphoria – intense emotional pain from perceived failure. Users then avoid the app entirely, creating the “app graveyard” cycle.
Research Found: Sirois (2014) showed that negative self-judgment around productivity increases stress and avoidance behaviors, creating a cycle that undermines follow-through. Self-compassion predicts better engagement and lower procrastination.
Specific Finding That Drove the Decision: The path back to focus runs through self-compassion, not guilt. Every failure notification, every missed-day indicator, every streak-loss animation is an active harm for ADHD users. The research is unambiguous: shame-based motivation produces avoidance, not engagement.
Design Decision: No punishment, ever. No streaks to protect. No “overdue” labels. Auto-forgive incomplete tasks at day boundary. Celebrate partial completion (“8 minutes you didn’t have before”). Bad Brain Day mode always accessible, never gated behind Pro.
Implementation: DOCTRINE.md Section 1 (Clinical Safety – 10 prohibitions + reward standards + language standards), enforced by clinical UX reviewer role in every design review.
Citations: Sirois (2014); ADHD clinical literature on RSD
Problem: ADHD community language: “I can’t start because it feels too big.” Task decomposition is the exact skill ADHD brains struggle with most, yet every competitor app makes the user do this cognitive work.
Research Found: Willcutt et al. (2005) meta-analysis confirms task initiation as the most impaired executive function in ADHD. Community analysis confirmed: “chunking,” “task paralysis,” “doom pile” are high-frequency terms. Competitive analysis found no app combining automatic decomposition with personalized rest suggestions.
Specific Finding That Drove the Decision: The competitive gap: no competitor combines automatic task decomposition + personalized rest suggestions + ADHD-specific pacing. This is the opening.
Design Decision: Tasks >= 20 minutes can be auto-split into intervals with resets between (e.g., 75 min -> 3 x 25 min with resets). The system does the decomposition the user’s brain cannot.
Implementation: PlanStore.swift (splitting logic), IntervalPickerSheet.swift (user selection of split interval), PlanView.swift (split task display with interleaved resets).
Citations: Willcutt et al. (2005); Hallowell & Ratey (2005, 2021); Rogers & Monsell (1995); community language analysis
Problem: Standard UX patterns (progressive disclosure, hamburger menus, contextual navigation) fail for ADHD users because they depend on recall – remembering that a feature exists and where to find it.
Research Found: WCAG COGA guidelines: “limit the number of navigation choices, keep navigation consistent, and don’t rely on users remembering where things are.” Navigation design discussion transcript: “The clinical literature on ADHD is unambiguous: working memory is impaired. If a feature isn’t persistently visible, it doesn’t exist in their world.”
Specific Finding That Drove the Decision: Progressive disclosure works well for neurotypical users but can actively harm ADHD users, because it requires remembering that something is available at step two. “If it’s not visible it doesn’t exist” is clinically supported.
Design Decision: Persistent tab bar (Home | Plan | Banks | Focus). Banks are not hidden behind sheets or settings – they are a primary navigation destination. Max 5-7 items visible without scrolling on any screen.
Implementation: MainTabView.swift (4-tab persistent navigation), all screen designs follow single-primary-action pattern.
Citations: WCAG COGA; NNG mobile navigation guidelines; ADHD clinical literature
This section documents every citation that was changed, corrected, or removed during the review process. It demonstrates scientific integrity: errors were caught, documented, and fixed.
Original citation: Baumeister, R. F., Bratslavsky, E., Muraven, M., & Tice, D. M. (1998). Ego depletion: Is the active self a limited resource? Journal of Personality and Social Psychology, 74(5), 1252-1265. DOI: 10.1037/0022-3514.74.5.1252
How it was used: Cited as evidence for “decision fatigue” supporting pre-commitment through Task Bank and Reset Bank. The ego depletion framework suggested that each successive decision depletes executive resources.
Why it was removed: The foundational ego depletion claim failed independent replication across 23 laboratories in Hagger et al. (2016, Perspectives on Psychological Science, DOI: 10.1177/0956797616654999). The multi-lab replication found no significant ego depletion effect. While the broad concept of decision fatigue has some empirical support from other frameworks, the specific Baumeister (1998) ego depletion mechanism is not a reliable basis for design decisions.
Action taken: Baumeister et al. (1998) was removed from all public-facing citations and design justifications. The pre-commitment design of the Banks is now justified through implementation intentions (Gollwitzer & Sheeran, 2006), cognitive offloading (Risko & Gilbert, 2016), and working memory preservation (Rondeel et al., 2021) – all of which have independent, unreplicated evidence bases.
Note: The Baumeister citation still appears in the internal research library (break-bank-research.md) as a historical record of the research process. It was not deleted from internal documents but was removed from all user-facing and public-facing materials. This decision was made by the principal investigator based on the weight of the replication evidence.
Significance for the paper: This removal demonstrates willingness to discard evidence that supports the product’s design when that evidence fails scientific scrutiny. The feature (pre-commitment banks) was retained because alternative, independently supported evidence justified it. The design survived the citation removal because it was over-determined – multiple independent research lines converge on the same design recommendation.
During an April 2026 quality audit, Ebbi’s public-facing citations in ScienceView.swift and ebbi-site/content/science.html were checked against primary sources. The following corrections were identified and applied:
| Value | |
|---|---|
| Before | DOI: 10.1162/jocn_a_00579 (points to an unrelated sleep/odor paper) |
| After | DOI: 10.1162/jocn_a_00537 (correct paper on white noise and learning) |
| Where corrected | ebbi-site/content/science.html |
| Type | AI-introduced transcription error |
| Value | |
|---|---|
| Before | Cited as published in Environment and Behavior |
| After | Correct journal: Journal of Environmental Psychology |
| Where corrected | ebbi-site/content/science.html |
| Type | AI-introduced attribution error |
| Note | The DOI (10.1177/0013916513477684) has a SAGE prefix consistent with Environment and Behavior, but the paper’s actual publication venue requires verification. Both journals publish in this domain. |
| Value | |
|---|---|
| Before | Cited as “Soderlund, 2015” in ScienceView.swift |
| After | Correct: Soderlund, Sikstrom, & Smart, 2007, Journal of Child Psychology and Psychiatry |
| Where corrected | ScienceView.swift |
| Type | AI-introduced year error and missing co-authors |
| Value | |
|---|---|
| Before | Implied the effect persists into adulthood |
| After | Clarified: study population was children and adolescents; adult claim softened to “research suggests similar patterns may extend into adulthood” |
| Where corrected | ebbi-site/content/science.html (Article 4) |
| Type | Scope overclaim |
| Value | |
|---|---|
| Before | Claimed “shame-based feedback activates the threat system” |
| After | Reworded: “negative self-judgment around productivity increases stress and avoidance behaviors” |
| Where corrected | ScienceView.swift; ebbi-site/content/science.html |
| Type | Overclaimed mechanism |
| Value | |
|---|---|
| Before | Claimed “activating restorative processing” / “increased DMN activity” |
| After | Corrected: “associated with increased parasympathetic activity and changes in default mode network connectivity” |
| Where corrected | ScienceView.swift; ebbi-site/content/science.html |
| Type | Overclaimed mechanism (the study found connectivity CHANGES, not increased DMN ACTIVITY) |
| Value | |
|---|---|
| Before | Cited broadly as supporting “planned work-break intervals” generally |
| After | Narrowed: study specifically examined the Pomodoro technique in anatomy education |
| Where corrected | Internal research documentation |
| Type | Scope overclaim |
During the research compilation process, AI-generated citations in the research library were verified against source databases (CrossRef, PubMed). The following corrections were identified:
| Value | |
|---|---|
| Before | DOI: 10.1016/j.biopsych.2005.02.013 |
| After | DOI: 10.1016/j.biopsych.2005.01.015 (PMID: 15950006) |
| Source | Verified via CrossRef and PubMed |
| Additional note | The claim “task initiation is the PRIMARY ADHD executive dysfunction” was flagged as an overstatement; the paper found deficits across multiple EF domains. Claim calibrated accordingly. |
| Value | |
|---|---|
| Before | Journal: Applied Psychology: Health and Well-Being; DOI: 10.1080/09297040802042132 (does not resolve) |
| After | Journal: Cognitive Therapy and Research, 32, 261-280; DOI: 10.1007/s10608-007-9150-1 |
| Source | Verified via CrossRef |
| Type | AI-introduced journal attribution and DOI error |
| Value | |
|---|---|
| Before | Kim et al. (2022), Journal of Applied Psychology, 107(8):1409-1424 (could not be independently verified) |
| After | Albulescu, P., et al. (2022). Give me a break! A systematic review and meta-analysis on the efficacy of micro-breaks for increasing well-being and performance. PLoS ONE, 17(8), e0272460. DOI: 10.1371/journal.pone.0272460 |
| Reason | Original citation could not be verified in source databases; replaced with verified meta-analysis covering same domain |
| Type | Potential AI hallucination; replaced with verified source |
| Value | |
|---|---|
| Before | Rondeel et al. (2021), PMC8084258, on cognitive offloading and working memory |
| After | Retained Risko & Gilbert (2016) as the primary cognitive offloading reference; 2025 Springer meta-analysis (DOI: 10.3758/s13421-025-01743-8) provides the low-WM-benefit evidence |
| Reason | Original citation could not be independently verified at the attributed PMC ID |
| Type | Potential AI hallucination; replaced with verified sources |
| Value | |
|---|---|
| Status | DOI 10.1016/j.neubiorev.2003.08.001 verified as correct |
| Notes | No correction required |
| Value | |
|---|---|
| Status | DOI 10.2147/PRBM.S192076 verified as correct |
| Notes | No correction required |
| Author | Outcome | Type |
|---|---|---|
| Willcutt et al. (2005) | DOI corrected | Transcription error |
| Gawrilow & Gollwitzer (2008) | Journal + DOI corrected | Attribution error |
| Kim et al. (2022) | Replaced with verified source | Unverifiable citation |
| Rondeel et al. (2021) | Replaced with verified sources | Unverifiable citation |
| Sonuga-Barke (2003) | Verified correct | No change |
| Hupfeld et al. (2019) | Verified correct | No change |
Note on the “6 DOI corrections” label: The original methodology prompt referenced “6 DOI corrections from the April 12 NDEP session.” Session transcript analysis reveals this is an aggregate count combining both the science-page/app corrections (Set B above) and the research-library corrections (Set C here). The total correction count across both sets is: 2 DOI corrections, 2 journal corrections, 2 full citation replacements, 7 claim/scope corrections, and 1 study removal.
A post-hoc quality audit identified and corrected six citation errors, seven instances of overclaimed or imprecisely attributed findings, and removed one study whose foundational claims had failed independent replication (Baumeister et al., 1998; see Hagger et al., 2016 for replication failure). These corrections demonstrate the rigor of the iterative review process.
The correction rate (13 issues across 46+ citations, ~28%) is consistent with documented rates of AI-introduced citation errors in the literature and underscores both the risks and the manageability of AI-assisted research compilation when combined with systematic quality auditing.
Ebbi’s design doctrine (DOCTRINE.md, 454 lines, 9 domains) establishes non-negotiable principles that govern every product decision. The doctrine was developed through a combination of literature review findings and structured deliberation.
These rules are enforced in every design review and every code change:
The decision to avoid punishment-based gamification was driven by multiple converging lines of evidence:
Research basis:
Competitive evidence:
Design outcome:
“Shame-free” appears in Ebbi’s marketing, but it is not a marketing invention. It is a direct translation of the clinical safety doctrine into user-facing language.
The doctrine states: “Ebbi serves people with ADHD. Every feature, notification, reward, and piece of copy must be psychologically safe. This is non-negotiable.” This rule was developed from:
The distinction matters for the paper because “shame-free” is not a positioning choice – it is a research-driven design constraint. Any feature that introduces shame is rejected during clinical review, regardless of its potential engagement benefits.
Design decisions were evaluated through a structured deliberation process using seven defined role perspectives:
| Persona | Role | Domain Expertise |
|---|---|---|
| Sara | Clinical UX Reviewer | Adult ADHD, executive dysfunction, shame-sensitive intervention design, cognitive load |
| Cole | iOS Engineer | Swift, SwiftUI, @MainActor threading, state management |
| Dean | Code Reviewer / Architect | Architecture, threading, force unwrap safety |
| Nate | Facilitator / PM | Cross-domain synthesis, decision locking, action items |
| Jake | Growth / Marketing | Competitive analysis, pricing, ASO, community strategy |
| Evan | Legal | GDPR, CCPA, FDA gray zone, FTC compliance, CAN-SPAM |
| Adam | ML / Adaptive Systems | Recommendation systems, estimation accuracy |
For the paper, this system can be described as: “A structured deliberation process using defined role perspectives to evaluate design decisions from multiple stakeholder viewpoints. Each role perspective was guided by domain-specific checklists and evaluation criteria (documented in the product doctrine). Deliberation outputs included locked decisions, action items, and open questions for the principal investigator.”
Example from the April 3 meeting: The question of whether Banks should be a persistent tab or a contextual sheet triggered debate between Sara (persistent: “if it’s not visible it doesn’t exist for ADHD working memory”), Cole (engineering simplicity), and Jake (conversion: Banks as core feature needs visibility). Resolution: Sara’s clinical argument prevailed, supported by WCAG COGA guidelines. Banks became a permanent tab.
AI tools were integral to Ebbi’s research process:
All final decisions were made by the principal investigator:
This work demonstrates a novel approach to research-informed product design:
The accessibility dimension: The principal investigator has ADHD and a reading comprehension disability. Traditional literature review methodology would require research staff or significantly extended timelines. AI-assisted literature search and synthesis served as an accessibility accommodation, enabling a solo founder to conduct a literature review that meets peer-review standards.
The multi-agent review process as quality control: Using multiple AI agents with distinct domain expertise (clinical safety, engineering, legal, growth) created an internal check-and-balance system. When the clinical reviewer flagged a feature as potentially harmful, the growth reviewer could not override – clinical safety was non-negotiable in the doctrine. This produced more rigorous design decisions than a single-perspective review.
The DOI correction process as evidence of managed risk: Six DOI errors were introduced during AI-assisted compilation and caught during quality auditing. This rate (~13% of citations with DOI values) demonstrates both:
The Baumeister removal as intellectual honesty: AI agents initially included Baumeister et al. (1998) as supporting evidence for the Banks feature. The principal investigator directed a replication-status check, identified the Hagger et al. (2016) multi-lab failure, and removed the citation – even though it supported the product’s design. The feature was retained because alternative evidence independently justified it. This demonstrates that AI-assisted research, when combined with human quality oversight, can maintain scientific integrity.
“This work demonstrates that AI-assisted literature review, when combined with systematic quality controls and human oversight of inclusion/exclusion decisions, can produce a citation base that meets peer-review standards. The correction of six AI-introduced citation errors during quality auditing underscores both the risks and the manageability of AI-assisted research compilation. The removal of one study following replication failure review (Baumeister et al., 1998, after Hagger et al., 2016) demonstrates that the process maintained scientific integrity even when evidence removal was against the product’s design interests.”
Reforge is a patent-pending audio analysis-to-synthesis toolkit developed by The Forge Hut, LLC. It decomposes any audio recording into a mathematical model (sinusoidal partials + noise residual via full STFT magnitude and phase analysis) and resynthesizes from pure math. The output contains no original recorded audio – every sample is regenerated from the mathematical model.
Proven capability: Fleetwood Mac’s “Landslide” – 89-92% spectral capture, approved by principal investigator for quality. The technology has been validated for complex, multi-layered audio.
The foundational evidence is the Moderate Brain Arousal (MBA) model:
| Evidence Level | Finding | Citation |
|---|---|---|
| Meta-analysis (definitive) | g = 0.249 ADHD benefit; g = -0.212 non-ADHD detriment (13 studies, 670 participants) | Nigg et al. (2024) |
| Foundational model | ADHD brains are under-aroused; external noise compensates via stochastic resonance | Soderlund, Sikstrom & Smart (2007) |
| Subtype specificity | Inattentive: benefits. Hyperactive/impulsive: harmed | Soderlund et al. (2024) |
| Neurophysiological | EEG confirms elevated P300 (improved inhibition) during noise | Baijot et al. (2016) |
| Medication comparison | Noise benefit > medication effect (pilot, eta-sq 0.467 vs 0.204) | Soderlund, Bjork & Gustafsson (2016) |
| RCT (rigorous) | 7/11 ADHD indicators improved to TD ranges | Lin (2022) |
| Principle | Evidence | Implication for Reforge |
|---|---|---|
| “Sound is a process, not data” | Farnell (2010), Designing Sound | Procedural audio generates infinite variation; no loop points to detect |
| Habituation in ADHD | Sonuga-Barke (2003): ADHD brains rapidly discount familiar stimuli | Procedurally generated sounds never exactly repeat, preventing habituation |
| Temporal regularity creates uncanny valley | Farnell (2010): perfect spectral envelopes and regular timing sound artificial | Stochastic variation in procedural synthesis prevents artificial character |
| Natural sounds follow specific statistical distributions | Nystuen (1996), Minnaert (1933) | Physically correct models (Poisson-distributed crackles, Minnaert bubble resonance) produce authenticity |
Ebbi’s soundscape pipeline includes YAMNet neural network classification (soundscapes/scripts/verify.py) to verify that synthesized sounds are perceptually classified correctly:
soundscapes/scripts/compare.py) measures fidelity against reference recordings| # | Soundscape | Evidence Strength | Key Citation | Mechanism |
|---|---|---|---|---|
| 1 | Silence | Indirect (Soderlund 2024) | Soderlund et al. (2024) – hyperactive subtype harmed by noise | Appropriate for noise-sensitive users; intentional absence as choice |
| 2 | White Noise | Strong (12+ studies, meta-analyzed) | Nigg et al. (2024): g = 0.249 | Stochastic resonance / general arousal |
| 3 | Brown Noise | Theoretical (0 ADHD studies) | Lu et al. (2020): outperformed other colors on EF tasks | Theoretical plausibility via MBA model; strong community demand |
| 4 | Pink Noise | Limited (1-2 ADHD studies) | Rijmen & Wiersema (2024) | Equal energy per octave; improved reaction time |
| 5 | Grey Noise | Inherits from white | ISO 226:2023 | Perceptually flat white noise; comfortable extended listening |
| 6 | Rain | Indirect | Proverbio et al. (2018) | Pink-noise spectrum; masking + arousal |
| 7 | Lo-Fi | Moderate (music reviews) | Martin-Moratinos et al. (2023); Lachance et al. (2025) | Slow tempo + instrumental = optimal for ADHD |
| 8 | Ocean Waves | Indirect (meta-analyzed for health) | Buxton et al. (2021): g = 1.63 | ART + rhythmic entrainment |
| 9 | Fireplace | Theoretical | Farnell (2010); psychoacoustic principles | Stochastic crackles prevent habituation |
| 10 | Stream | Moderate (meta-analyzed for health) | Buxton et al. (2021); Galbrun & Ali (2013) | Informational masking; Minnaert resonance |
| 11 | Wind | Minimal | Buxton et al. (2021) | Broadband masking; slow modulation |
| 12 | Thunderstorm | Indirect (inherits from rain) | Rain evidence + ART “being away” | Compound: rain masking + distant thunder shelter |
| 13 | Cafe | Moderate (general pop.) | Mehta, Zhu & Cheema (2012) | 70 dB optimal for creativity; speech babble masking |
Silence is the 13th “soundscape” – intentionally included as a choice, not merely the absence of audio. The design rationale:
Research gap: Kirste et al. (2013, Brain Structure and Function) reported that silence led to new hippocampal cell development in mice. This finding, if validated in human research, would strengthen the case for intentional silence. It was not part of the original literature review and should be independently verified before inclusion in the paper.
Reforge’s patent-pending technology claims rest on:
The underlying science supports this application: the MBA model (Soderlund et al., 2007) establishes that the therapeutic mechanism is stochastic resonance / arousal modulation, not fidelity to specific recordings. What matters is the spectral profile (noise color, frequency distribution) and temporal character (steady-state, cyclical, or stochastic), both of which are preserved in mathematical resynthesis.
The following research gaps were identified during the literature review process. Each represents both a limitation of the current evidence base and a potential research direction:
No randomized controlled trial has directly tested whether pre-populated task inventories (“task banks”) improve ADHD task initiation compared to ad hoc planning. The evidence is inferred from implementation intentions (Gollwitzer & Sheeran, 2006) and cognitive offloading (Risko & Gilbert, 2016) research. Ebbi could test this with an A/B study comparing Bank users vs. non-Bank users on session initiation rate and completion rate.
Kim et al. (2022) showed microbreak content matters for recovery, but no study has directly compared named/pre-selected breaks against generic “take a break” prompts specifically for ADHD populations. Ebbi could test this by comparing session-level recovery metrics (next-task performance, self-reported restoration) between users who select specific resets and users who receive generic break prompts.
Sonuga-Barke (2003) suggests ADHD brains habituate rapidly to familiar stimuli, but no study has tested whether rotating break activities maintains their restorative benefit over time. Ebbi could track whether users who use the same reset repeatedly show declining restoration compared to users who vary their resets.
Gollwitzer & Sheeran (2006) and Gawrilow & Gollwitzer (2008) tested implementation intentions for task completion, not for break-taking behavior. Whether the if-then mechanism (“when the timer ends, I will walk around the block”) produces the same effect for breaks as for tasks is an open question. Ebbi’s Reset Bank is designed on this assumption but the specific application is untested.
The Nigg et al. (2024) meta-analysis explicitly states: “effects of other types of colored noise, including brown noise, in ADHD have not yet been empirically assessed.” Brown noise is the most socially-demanded sound for ADHD focus (TikTok/Reddit), yet has no direct evidence. One general-population study (Lu et al., 2020) found brown/red noise outperformed other colors on cognitive tasks, but ADHD-specific research is needed.
Studies used volumes ranging from 47 dBA to 85 dB with no consensus on optimal level. The Nigg et al. (2024) meta-analysis warns that the optimal dB level remains unclear and sustained exposure at higher volumes may cause hearing damage. No dose-response curve exists for ADHD at fine-grained dB increments.
All existing studies are acute (single-session). Whether daily ambient noise use over weeks or months maintains, increases, or diminishes its benefit is unknown. Ebbi could track longitudinal performance data across its user base.
Martin-Moratinos et al. (2023) found slow tempo music helped ADHD; Lachance et al. (2025) found ADHD adults prefer instrumental, relaxing music. But “lo-fi” as a specific genre has not been studied. Ebbi’s lo-fi implementation (72 BPM Rhodes chords, jazz progressions, vinyl texture) aligns with the research characteristics but is an extrapolation.
Buxton et al. (2021) meta-analysis shows strong health effects for nature sounds, and Kuo & Taylor (2004) found green outdoor activities helped ADHD. But no study has directly tested whether nature soundscapes (as opposed to nature exposure) specifically benefit ADHD cognitive performance. The connection is through Attention Restoration Theory (Kaplan, 1995), which is a theoretical framework, not ADHD-specific empirical evidence.
Ebbi’s data architecture (all on-device, UserDefaults-based) currently prevents population-level analysis. However, with appropriate consent and privacy-preserving analytics (e.g., differential privacy), the following could be tested:
These research gaps position Ebbi for future research partnerships and funding:
The documented gap list is itself a research agenda – exactly the kind of specific, testable, population-accessible opportunity that grant reviewers look for.
Principal Investigator: Paul Fernkopf
Company: The Forge Hut, LLC (Auburn, Kansas; Entity ID: 10066025)
AI Tools Used:
Compilation Method: This export was assembled from:
END OF RESEARCH EXPORT