Growth mindset as a large lever

Teaching students that intelligence is malleable substantially improves achievement.

What actually happened

Real but small. Sisk et al. (2018) meta-analysis: d ≈ 0.08 overall. Yeager et al. (2019), a US national study, found gains concentrated in lower-achieving students and modest in size.

What to do instead

Worth doing, cheaply, especially for someone struggling. Not a substitute for teaching, resources or spaced practice.

The laws that do this job properly

P·08Praise the Process, Criticise the BehaviourPraise directed at effort and strategy holds up under later failure. Praise directed at the person collapses.solid
M·07Self-Criticism Is Not MotivationSelf-compassion after a failure produces more subsequent effort and improvement than self-criticism does.solid
F·11Small Wins Run the DayThe strongest driver of a good working day is visible progress in meaningful work — ahead of recognition, incentives and clear goals.solid

Every law on Useful Mind tells you how strong the evidence behind it is. The ones that failed are kept here rather than quietly deleted, because knowing which advice is wrong saves you as much as knowing which is right.

See the ones that held up