January 2026
- Jan 27, 2026ConceptsThe Gap Between Thinking and BehaviorMeta-analyses put intention-behavior correlations in health behavior around r = 0.4 to 0.5, so stated intention accounts for roughly a fifth to a quarter of what people actually do. The page traces the mechanisms, System 1 outrunning System 2 at the moment of action, present bias, social desirability, dissonance resolving through belief change, then the fixes: implementation intentions, which Gollwitzer and Sheeran found roughly doubled follow-through.
- Jan 25, 2026ConceptsWhy Intentions Do Not Predict ActionsSheeran's review of 422 studies put the average intention-behavior correlation at r = 0.47, leaving roughly 78% of behavior to other causes, and one physical activity study found 77% intending to exercise against 35% doing it. The page then covers what works instead: if-then implementation intentions, which raised goal achievement about 54% across 94 studies, environmental friction, commitment devices, and habit timelines.
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