researchers at Kings College London looked at intelligence over 64 years . In total , more than 200,000 participants in IQ trials were studied . Since 1950 , average intelligence was found to increase by about 100 IQ points . Explanations include better intelligence and better 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 .