The Song Only You Can Hear
Tappers thought half of their listeners would name the song. The real hit rate was 2.5 percent — and being told about it didn't help.
The Checkbox That Decides Everything
Germany: 12% organ donors. Austria: 99.98%. Two neighbours, near-identical culture, one difference on a form nobody reads.
The Dogs Who Forgot How to Jump
In 1967, three groups of dogs received the same shocks — but only one group learned that nothing they did mattered. The next day, when escape was one small jump away, most of them lay down and whined instead. The pain wasn't the lesson. The belief that nothing works was. And what gets learned can be unlearned.
More Practice, Worse Learning — Sweller's Cognitive Load Paradox
In the 1980s, John Sweller discovered something embarrassing for educators: the more problems students solved themselves, the less they learned. The secret was hiding in a bottleneck called working memory.