What the research says

In Tide: The Brain Dump, the visible timer, and the anchor’s why on screen during Focus.

Barkley’s executive-function model argues that people with EF deficits are best helped by putting information into the physical environment at the point of performance (lists, timers, cues) rather than relying on internal recall. CBT programs for adult ADHD (Safren; Solanto; Ramsay & Rostain) use external task lists and planning as core modules.

• Barkley — EF and self-regulation in ADHD (factsheet)
• Safren et al. 2010, JAMA — CBT for adult ADHD RCT
• Matsumoto et al. 2024, BMJ Mental Health — CBT components network meta-analysis (organisational strategies)

In Tide: “Break it down” makes 3–7 steps. The first is deliberately almost trivial and phrased as an if-then plan (“When I open my laptop, I’ll…”).

Steel’s meta-analysis of procrastination (691 correlations) finds task aversiveness, low self-efficacy and impulsiveness are the strongest predictors. Bandura & Schunk showed proximal subgoals raise self-efficacy and interest more than distant goals. The strongest related evidence is for if-then plans (implementation intentions: meta-analytic d = 0.65; normalized inhibition in children with ADHD). Only Tide’s first step is phrased that way; the rest are small sub-tasks, so we borrow the direction of that evidence, not its effect size.

• Steel 2007, Psychological Bulletin
• Gollwitzer & Sheeran 2006 — implementation intentions meta-analysis
• Gawrilow & Gollwitzer 2008, Cognitive Therapy and Research

In Tide: Wins never reset. Yesterday’s tasks are re-chosen, not marked overdue. Weekly minimums count cumulatively.

Silverman & Barasch (seven studies) found that displaying a broken streak reduces subsequent engagement regardless of actual behavior, most strongly when the break feels self-caused. Lally et al. found that missing a single day did not materially affect habit formation. Dai, Milkman & Riis showed temporal landmarks (“fresh starts”) increase aspirational behavior. In one small clinic sample (N = 30), perfectionism was the most-endorsed cognitive distortion in adults with ADHD, which makes streak-breaking a plausible shame trigger.

• Silverman & Barasch 2023, Journal of Consumer Research
• Lally et al. 2010, European Journal of Social Psychology
• Strohmeier et al. 2016, Psychiatry Research
• Dai, Milkman & Riis 2014, Management Science

In Tide: The Focus timer shows time as a shrinking ring, not just digits, and a short planned break (about a fifth of the round) comes before the next round.

Time-perception deficits in ADHD are established meta-analytically, across the lifespan. Evidence that a visual timer specifically helps adults does not yet exist: the best study is a small within-subject trial of 44 typically developing 7–9-year-olds, where a visual timer reduced anticipatory anxiety and off-task behavior, most for children with higher ADHD-trait scores. The planned break follows a study of 87 students in which fixed work/break cycles (24/6 or 12/3 minutes) left people less tired and distracted than self-chosen breaks, with the same amount done in less time.

• Marx, Cortese et al. 2022, JAACAP — perceptual timing in ADHD (meta-analysis, 55 studies)
• Metcalfe et al. 2024, Developmental Neuropsychology — time perception across the lifespan (meta-analysis)
• Hallez & Vallier 2025 — visual timer study (typically developing children)
• Biwer et al. 2023, British Journal of Educational Psychology — systematic vs self-regulated breaks

In Tide: The evening WhatsApp reflection asks for one win; the weekly recap replays them.

Seligman’s “three good things” exercise (three good things nightly for one week) raised well-being for up to six months; Tide asks for one, a lighter dose no study has tested. Amabile & Kramer’s diary study found perceived progress on meaningful work is the strongest predictor of a good day. A cross-sectional study of adults with ADHD found lower self-compassion explained part of their poorer mental health; that is why the prompts never mention what was missed. No study tests a weekly recap.

• Seligman et al. 2005, American Psychologist
• Beaton et al. 2022, Journal of Clinical Psychology — self-compassion in ADHD

In Tide: Morning brief and routine nudges on WhatsApp.

The one randomized trial of SMS reminders in adults with ADHD found no effect on module completion, logins or practice; reminders only produced faster logins and more time in some modules early on. A meta-analysis of text-message health interventions finds a modest overall effect (d ≈ 0.33) and that personalized messages with individualized or decreasing frequency beat fixed schedules. Tide’s companion currently runs on a fixed daily schedule, which that evidence argues against; it is in a small beta for that reason.

• Nordby et al. 2022, Frontiers in Digital Health
• Head et al. 2013 — text-messaging interventions meta-analysis

In Tide: Each anchor has a why; it appears on the Focus screen.

Writing about a task’s personal relevance raised interest and performance, especially for low-expectancy students (Hulleman & Harackiewicz). Evidence that re-displaying it during work sustains effort is thin; Barkley notes cues alone are “only partially successful” without more immediate rewards, which is what the Wins log tries to be.

• Hulleman & Harackiewicz 2009, Science

In Tide: Today holds three. The fourth is refused, kindly.

No study tests a cap of three. Working-memory capacity is roughly four items (Cowan), lower under load, and CBT programs teach prioritizing a few A-tasks over a long list. “Three” is a heuristic from the productivity canon that fits that evidence; it is not itself a finding.

• Cowan 2001, Behavioral and Brain Sciences

In Tide: “I am someone who…” statements attached to anchors.

The “votes” metaphor is James Clear’s. Identity-based motivation (Oyserman) and self-perception theory support the direction behavior → identity; Verplanken & Sui find identity consolidates after repeated behavior rather than triggering it. Useful for maintenance, unproven as a starter. Tide keeps identity statements optional and phrased as behavior (“someone who shows up”), not traits.

• Verplanken & Sui 2019, Frontiers in Psychology