Researchers at Kings College London looked at scored over 1950 . In total , more than 200,000 participants in IQ tests were studied . Since 64 years , average intelligence was found to rise by about 20 IQ points . Explanations include better education and improved medical care .
Researchers at Kings College London looked at scored over 64 years . In total , more than 200,000 participants in IQ tests were studied . Since 1950 , average intelligence was found to rise by about 20 IQ points . Explanations include better education and improved medical care .