1. Contrast tests of interaction hypotheses;Abelson;Psychological Methods,1997
2. Developing, implementing, and evaluating a condom promotion program targeting sexually active adolescents;Alstead;AIDS Education & Prevention,1999
3. The moderator-mediator variable distinction in social psychological research: Conceptual, strategic, and statistical considerations;Baron;Journal of Personality and Social Psychology,1986
4. Principles and procedures of exploratory data analysis;Behrens;Psychological Methods,1997