The above hypothesis with respect to the quit success score’s action mechanism and Musci et al. (2015b)’s finding of a score × environment interaction in terms of the course of marijuana use in adolescence formed the basis for the current paper. More specifically, using the Ialongo et al. (1999) preventive intervention trial data, we tested whether Uhl et al. (2010)’s quit success score would moderate the potential effect of the intervention on the age at which marijuana was first smoked. We hypothesized that like with tobacco, that a higher quit success score would be associated with greater intervention impact indexed as delaying the initial use of marijuana. We reasoned that the quit success score may be an indicator of sensation seeking and novelty preference, thereby influencing an individual’s propensity for substance use initiation.
