Results of a new longitudinal research study done in the United Kingdom led to the conclusion that high childhood IQ increases the risk of illegal drug use in adolescence and adulthood. ”It’s counterintuitive,” said lead author James White. “It’s not what we thought we would find.”
The Cardiff University team looked at data from 8,000 people born in April, 1970. This interesting group, called the British Cohort Study, took surveys approximately once every five years about a broad host of topics. The results, published in the Journal of Epidemiology and Community Health, found that subjects that tested above average on IQ tests at age 5 were twice as likely to have done hard drugs within the past year, when asked at age 30.
The authors asked the subjects about their use of marijuana, cocaine, amphetamines, ecstasy and polydrug use within the last twelve months as well as about questions about social class, education, and psychological distress.