The science

Mental training that's actually been measured.

Mind Games doesn't sell vibes. Every core tool maps to techniques that sport psychologists use with pro and Olympic athletes — and that researchers have tested in hundreds of controlled studies. Here's the evidence, in plain English.

+0.43

Performance gain from mental imagery

meta-analysis, d = 0.43

Studies on imagery & sport skill

3,593 athletes

+0.48

Effect of structured self-talk

32 studies, ES = 0.48

+0.70

Pre-game routines under pressure

Hedges' g = 0.70

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What does "+0.43" actually mean?

Those numbers are effect sizes — the standard way scientists measure how big an improvement is, pooled across many studies. Instead of a raw percentage (which means different things in different sports), an effect size measures the change in standard deviations, so results from a free-throw study and a sprint study can be compared on the same scale.

You'll see them written as Cohen's d or Hedges' g — they're essentially the same idea. The widely used rule of thumb for what counts as a meaningful difference:

~0.2

Small

~0.5

Medium

~0.8

Large

+0.43 — Visualization. A solid medium boost in performance from mental imagery, averaged across 86 studies.

+0.48 — Self-talk. A dependable medium effect from the right cue words and reframes.

+0.70 — Pre-game routines. A large improvement when athletes run a routine under real pressure.

For context, an effect size of 0.5 roughly means the average athlete who trained the skill outperformed about 69% of those who didn't. These aren't tiny, hard-to-notice changes — they're the kind of edge that shows up on game day.

The evidence

Every feature, matched to the research

Each tool in the app maps to specific studies and the scientists behind them.

Guided Visualizationsd = 0.43

medium effect

Visualization rewires the moment

When you vividly rehearse a skill, your brain fires many of the same pathways it uses to physically perform it — so the movement feels automatic when it counts. A 2025 multilevel meta-analysis of 86 studies and 3,593 athletes found a reliable medium boost from imagery (largest when paired with real practice, g = 0.58). Neuroscientist Dr. Guang Yue famously showed people raised muscle strength up to ~35% through imagined contractions alone — proof the brain treats vivid rehearsal as real reps.

Multilevel meta-analysis of imagery practice — Behavioral Sciences (2025) Ranganathan, Siemionow & Yue — "From mental power to muscle power," Neuropsychologia (2004)

Confidence ExercisesES = 0.48

moderate effect

What you tell yourself changes the outcome

Structured self-talk — the cue words and reframes behind our confidence drills — has one of the most consistent track records in sport psychology. A landmark meta-analysis led by sport psychologist Antonis Hatzigeorgiadis pooled 32 studies (62 effect sizes) and found a moderate, dependable improvement — biggest on precise, skill-based tasks and for athletes actually trained how to use it.

Hatzigeorgiadis et al., Perspectives on Psychological Science (2011)

Pre-Game Routinesg = 0.70

large effect under pressure

A routine beats hoping for the best

A consistent pre-performance routine gives your attention somewhere to go when the stakes spike, instead of leaving room for doubt. A 2021 meta-analysis by Rupprecht and colleagues at the University of Vienna pooled 112 effect sizes and found moderate-to-large gains — and crucially the benefit held up under pressure (g = 0.70), regardless of sport, age, gender, or skill level.

Rupprecht et al., Int'l Review of Sport & Exercise Psychology (2021)

Journaling146

controlled trials

Writing it down clears the head

Putting pressure, setbacks, and wins into words is one of the most-studied ways to regulate emotion — the "expressive writing" method pioneered by Dr. James Pennebaker. Psychologist Joanne Frattaroli pooled 146 controlled trials and found writing reliably improves psychological and physical health, especially for people under high stress.

Frattaroli — "Experimental Disclosure and Its Moderators," Psychological Bulletin (2006)

Goals400+

studies, 40,000+ people

Specific goals beat "do your best"

Setting specific, challenging targets reliably drives higher performance than vague intentions. Edwin Locke and Gary Latham's goal-setting theory is one of the most validated frameworks in all of psychology — built from roughly 400 studies and 40,000+ participants over 35 years — and feedback on progress is one of its key ingredients.

Locke & Latham — "Building a Practically Useful Theory of Goal Setting," American Psychologist (2002)

Check-Ins & Streaksdaily

consistency > intensity

What gets tracked gets better

Self-monitoring — simply noticing and recording how you feel — is a core, evidence-backed behavior-change tool, and feedback loops are what make goals work. Just as importantly, nearly every study above shows the gains come from repetition: that's why the app is built on quick daily check-ins, streaks, and XP to keep the habit alive.

Goal feedback & self-monitoring — Locke & Latham (2002)

How to read this honestly

These effect sizes come from research on the techniques Mind Games is built on, not from studies of this app specifically. Results vary by person, sport, and how consistently you practice — and like any average, individual experiences differ. Most studies also show the same thing great coaches do: the gains come from repetition, which is exactly why the app is built around short daily habits, streaks, and XP.

Mind Games is a training and self-improvement tool — not therapy, medical treatment, or an emergency service. If you're struggling, reach out to a qualified professional. If you're in crisis, call or text 988 (US Suicide & Crisis Lifeline).

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