A meta-analysis study on peer influence and adolescent substance use
The extent to which adolescents are influenced by their peers has been the focus of developmental psychological research for over 50 years. That research has yielded contradicting evidence and much debate. This study consists of a systematic review and meta-analysis, with the main aim of quantifying the effect of peer influence on adolescent substance use, as well as investigation into the factors that moderate this effect. Included studies needed to employ longitudinal designs, provide the necessary statistics to calculate cross-lagged regression coefficients controlling for target adolescent’s initial substance use, and comprise participants aged 10–19 years. A search of academic databases and reference lists generated 508 unique reports, which were screened using Covidence. The final inclusion criteria yielded a total of 99 effect sizes from 27 independent studies. A four-level meta-analytic approach with correction to allow the inclusion of multiple effect sizes from a given study was used to estimate an average effect size. Results revealed a significant effect of peer influence (β ¯ =.147, p [removed]
Watts, Lara L.
Hamza, Eid Abo
Bedewy, Dalia A.
Moustafa, Ahmed A.