Researchers have found that those with high childhood IQs are more prone to illegal drug use as adults. But what does this correlation really mean?
Two major papers have found a positive correlation between high childhood IQ and adult drug use.
The first was published in 2011 (Intelligence across childhood in relation to illegal drug use in adulthood: 1970 British Cohort Study). The second was published in 2012 (Intelligence quotient in childhood and the risk of illegal drug use in middle-age: the 1958 National Child Development Survey). Both were co-authored by James W. White PhD and all of the data for both research papers comes from The Centre for Longitudinal Studies (CLS), a research council operating from the Department for Quantitative Social Science, Institute of Education, at the University of London.
Perhaps it is the concept of intelligence that needs to be reconsidered in order to answer the question; IQ does not measure emotional intelligence or creativity.
Longitudinal studies observe variables over extended periods of time. Cohort studies are longitudinal studies of groups of people with shared characteristics or experiences; for example, the 1958 study follows the lives of 17,000 people born within the United Kingdom in a single week in 1958. The cohort is that group of 17,000 people. The CLS has done several such studies: in 1958, in 1970, another in 1989, and the Millennium Cohort Study of 2000-2001. All of these studies are, by definition, ongoing.