Abstract
The current study tested between-person hypotheses that global negative affect, friendship intimacy, and close friend drug use predict increased substance use, and the within-person hypothesis that friendship intimacy and close friend substance use moderate the temporal relationship between daily negative affect and subsequent substance use (i.e., self-medication). Experience sampling methodology captured daily variations in mood and substance use, and multilevel modeling techniques were used to parse between- versus within-person effects. Findings supported between-person hypotheses that greater negative affect and lower friendship intimacy predicted greater substance use, and a consistent trend indicated that friendship intimacy and close friend drug use interact to predict substance use overall (though not for self-medication). Risk and protective mechanisms indicate that the effect of friendship intimacy on adolescent use depends on close friend drug use.
Keywords
Get full access to this article
View all access options for this article.
