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Boles, Shawn; Biglan, Anthony; Smolkowski, Keith – Journal of Adolescence, 2006
The authors calculated binary indicators of seven positive and 23 negative behaviours for 22,898 8th and 15,828 11th grade students who participated in the Oregon Healthy Teens Survey across two school years. Relationships among these variables, using both the Jaccard measure of co-occurrence and the relative risk for each member of each variable…
Descriptors: Grade 11, Adolescents, Grade 8, Behavior Problems