300+ self-improvement ideas. Tested across 11 research domains. 7 widely-believed ones didn't survive. The rest were ranked by what actually works.
Find out what works for you"Willpower is a limited resource that gets drained when you use it."
DEBUNKED23 independent labs. 2,141 participants. The effect was not significantly different from zero. The "willpower budget" you've been managing doesn't exist.
Swipe through 7 research-backed claims
Lie or truth. Tap to flip. See what survived.
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5 interventions, sequenced so each one makes the next one easier.
TruthDeck started as a question: how much of the self-improvement advice people follow has actually been tested? I spent months reading meta-analyses, replication studies, and systematic reviews across psychology, neuroscience, and behavioral science. Most of the popular advice didn't survive contact with the evidence. The stuff that did was often buried in papers nobody reads. This is an attempt to fix that.