IQ Facts

In the US, a court ruled that police departments can legally reject applicants for scoring too high on intelligence tests, after a man was denied a job for being 'too smart.'

Offering people money for doing well on IQ tests causes them to score significantly higher. A meta-analysis found that financial incentives can boost scores by up to 10 points on average, with some studies showing even larger gains. This suggests IQ tests measure motivation and effort, not just raw intelligence.