Citation

Boccio CM, Beaver KM. Drug Alcohol Depend. 2017; 177: 199-206.

Affiliation

College of Criminology and Criminal Justice, Florida State University, 145 Convocation Way, Eppes Hall, Tallahassee, FL 32306-1127, United States; Center for Social and Humanities Research, King Abdulaziz University, Jeddah, Saudi Arabia. Electronic address: kbeaver@fsu.edu.

Copyright

(Copyright © 2017, Elsevier Publishing)

DOI

10.1016/j.drugalcdep.2017.04.007

PMID

28609722

Abstract

OBJECTIVES: There is conflicting evidence regarding the association between adolescent marijuana use and adult intelligence, with some studies suggesting adolescent marijuana use can lead to declines in intelligence. The purpose of this study is to shed additional light on the potential link between marijuana use and changes in intelligence.

METHODS: We employed change scores and ordinary least squares (OLS) analysis to test for associations between marijuana use and changes in intelligence scores from adolescence (ages 12-21) to adulthood (ages 18-26) using data drawn from the National Longitudinal Study of Adolescent to Adult Health.

RESULTS: The findings revealed that while a binary measure of marijuana use (ever/never) maintains a statistically significant association with changes in intelligence scores, the effect sizes are relatively small (β=0.043-0.051). Additionally, our findings did not reveal a significant association between cumulative marijuana use and changes in intelligence scores.

CONCLUSIONS: Taken together, the results suggest that while the binary measure of marijuana use (ever/never) has a statistically significant association with changes in intelligence scores, the binary measure accounts for at most a 1-2 point change in intelligence scores.

Copyright © 2017 Elsevier B.V. All rights reserved.

Language: en

Keywords

Adolescence; Intelligence; Marijuana