Marijuana Use among Calgary Youths as a Function of Sampling and Locus of Control

Abstract
The findings reported in this paper were based on a representative, city wide sample (N= 708) of Calgary youths (aged 15–24). Twenty six per cent of the respondents reported having used marijuana “in the past six months”. Contrary to Smart's (1970) differential school drop out hypothesis, no decline in drug use was reported by 17 and 18 year old students, As measured by Rotter's concept, internally oriented respondents were less apt than externals to use marijuana. As predicted, this correlation was stronger among high school than college respondents. Several other demographic correlates of marijuana use were found.

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