I’ve stumbled on a slightly offtopic but amazing example by user “cortesoft” on HN:
Flip 100 coins. Take the ones that ‘failed’ (landed tails) and scold them. Flip them again. Half improved! Praise the ones that got heads the first time. Flip them again. Half got worse :(
Clearly, scolding is more effective than praising.
I’ve stumbled on a slightly offtopic but amazing example by user “cortesoft” on HN: