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. Author manuscript; available in PMC: 2015 Nov 1.
Published in final edited form as: Drug Alcohol Depend. 2014 Aug 28;144:93–101. doi: 10.1016/j.drugalcdep.2014.08.012

Table 4.

Within-wave correlations between the three sources of social influence, age and participant's marijuana use (calculated as the partial correlation between variables controlling for dummy coded wave).

Correlations
Control Variables Self
(Previous month)		 Peer norms Presence of others Best friend use Age
Self (Previous month) 1.000 .274 .417 .399 .125
Peer norms .274 1.000 .499 .335 .303
Presence of others .417 .499 1.000 .490 .224
Best friend use .399 .335 .490 1.000 .168
Age .125 .303 .224 .168 1.000