sleep

Sleep record

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Samsung Health writes completed Galaxy Watch sleep to Health Connect after wake. The Android bridge sends completed sessions to this record.

design research scaffold

Sleep: a low-stimulation digital transition object with consented wearable outcome capture

AO Labs, 2026. This section documents the mechanism, Health Connect data path, and study plan; the live transition surface intentionally avoids coaching language.

Abstract

Sleep is a single-page progressive web application designed for the realistic bedtime condition in which phone removal is not a reliable first move. Instead of delivering sleep hygiene advice, meditation prompts, streaks, or self-improvement feedback, the interface behaves as a gradually disappearing transition object: it gives the user one soft focal object to watch, then progressively lowers light, contrast, movement, novelty, interaction, and reward density over a 13-minute sequence.

The design translates established sleep-psychology principles into environmental behavior rather than visible instruction. Its hidden mechanism combines stimulus-control logic, cognitive arousal reduction, future-thought offloading, slow respiratory pacing, circadian light minimization, sensory regulation, and progressive extinction of interaction rewards. The central hypothesis is that a phone surface can be made less reinforcing without becoming so boring that it provokes boredom-anxiety in users who seek stimulation at night.

Significance Statement

Most digital bedtime advice assumes the user can simply stop using the device. Sleep tests a narrower and more pragmatic design claim: for users who cannot reliably begin with no-phone behavior, a digital surface can still reduce pre-sleep arousal if it stops competing for attention and becomes an increasingly low-information sensory cue.

Mechanism

Figure 1. Proposed mechanism diagram. The live app does not expose these labels.
cuesame entry, same sensory field
offloadone small future thought capture
paceslow visual respiration and low-frequency sound
dimlower luminance, contrast, and spectral intensity
extinguishfewer controls, less novelty, weaker rewards
releasenear-black final state with minimal interaction
Figure 2. Planned study figure placeholder: nightly timeline, phone-touch cessation, sleep-onset latency, and pre-sleep arousal change under Sleep versus usual phone use.

Design Principles

  1. No coaching surface. The transition experience contains no sleep instructions, moralizing, affirmations, dashboards, streaks, or progress feedback.
  2. Enough sensory input to avoid threat-level boredom. The visual field starts warm, tactile, and slowly moving, then removes novelty gradually rather than abruptly.
  3. Drowsy focal path. The sleep surface gives one slow, dim focal object that can be watched without reading, choosing, or tracking performance.
  4. Interaction decay. Controls begin available, then shrink and fade so the app stops rewarding continued manipulation while preserving the soft focal path.
  5. Light discipline. The palette stays dark and warm, and the sequence trends toward near-black rather than blue-white alerting light.
  6. Single offload point. A tiny thought well permits future-oriented cognitive offloading without creating a journal, task manager, feed, or review loop.
  7. Non-clinical identity. The artifact is a comforting object, not a therapist, coach, tracker, or wellness brand.

Experimental Protocol Proposal

A first evaluation should use a two-week within-subject alternating-night design. Participants would compare Sleep against their usual phone behavior during the final 20 minutes before intended sleep. The transition surface remains non-coaching; a separate consented record can receive completed sleep sessions after wake through Health Connect.

Primary comparison nights should be balanced by weekday, caffeine/alcohol status, and intended bedtime. A follow-up n-of-1 protocol could test whether the same user shows earlier phone-touch cessation, lower pre-sleep arousal ratings, shorter subjective sleep-onset latency, and changed wearable-derived sleep duration after Sleep nights.

Health Connect Data Path

Galaxy Watch sleep is processed by Samsung Health on the paired phone after wake. When Samsung Health synchronization with Health Connect is enabled, a private Android bridge with read permission for sleep sessions can read completed Health Connect records and send session timing and stage intervals to the Sleep API.

The public transition surface does not receive raw phone or watch access. Sleep records remain behind a read token, and ingestion requires a separate bridge token. The record is a longitudinal outcome surface, not a diagnosis, treatment claim, or medical device.

Outcome Measures

Behavioral

Last phone interaction time, interaction count after sequence start, return-to-feed events, sequence completion without active manipulation.

Sleep

Subjective sleep-onset latency, wake after sleep onset, next-morning sleep quality, Health Connect sleep sessions, stage intervals, and nightly duration trend.

Arousal

Pre-Sleep Arousal Scale, rumination/worry rating, sensory comfort rating, boredom-anxiety rating.

Risk

Continued device engagement, irritation, anxiety from darkness, perceived coercion, increased sleep effort, or app checking.

Scaffolded References

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  3. Scullin MK, Krueger ML, Ballard HK, Pruett N, Bliwise DL. The effects of bedtime writing on difficulty falling asleep: a polysomnographic study comparing to-do lists and completed activity lists. Journal of Experimental Psychology: General. 2018;147(1):139-146. doi:10.1037/xge0000374.
  4. Zaccaro A, Piarulli A, Laurino M, Garbella E, Menicucci D, Neri B, Gemignani A. How breath-control can change your life: a systematic review on psycho-physiological correlates of slow breathing. Frontiers in Human Neuroscience. 2018;12:353. doi:10.3389/fnhum.2018.00353.
  5. Laborde S, Allen MS, Borges U, et al. Effects of voluntary slow breathing on heart rate and heart rate variability: a systematic review and a meta-analysis. Neuroscience & Biobehavioral Reviews. 2022;138:104711. doi:10.1016/j.neubiorev.2022.104711.
  6. Gooley JJ, Chamberlain K, Smith KA, et al. Exposure to room light before bedtime suppresses melatonin onset and shortens melatonin duration in humans. Journal of Clinical Endocrinology & Metabolism. 2011;96(3):E463-E472. doi:10.1210/jc.2010-2098.
  7. Lane SJ, Leao MA. Sleep, sensory integration/processing, and autism: a scoping review. Frontiers in Psychology. 2022;13:877527. doi:10.3389/fpsyg.2022.877527.
  8. Chu Y, Oh Y, Gwon M, et al. Dose-response analysis of smartphone usage and self-reported sleep quality: a systematic review and meta-analysis of observational studies. Journal of Clinical Sleep Medicine. 2023;19(3):621-630. doi:10.5664/jcsm.10392.