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The self-improvement industry sells becoming your best self through grit and mindset, but the large meta-analyses are deflating: grit turns out to be mostly conscientiousness renamed, and growth-mindset programmes move academic results only slightly
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Both now have large bodies of evidence behind them, and the evidence is more deflating than the keynote speeches suggest.
Growth mindset does less than the TED talkThe second pillar is the growth mindset, the belief that ability can be developed rather than being fixed.
The first, pooling 273 studies and more than 365,000 people, found only a weak overall association between holding a growth mindset and actual academic achievement.
The second, covering 43 mindset interventions, found that on average they nudged achievement only slightly, with a standardised effect of about 0.08.
These meta-analyses mostly measure academic and workplace performance, which is not the whole of anyone’s best self, and effect sizes in this field are actively debated.