Existing measures of peer pressure and conformity may not be suitable for efficiently screening large numbers of adolescents, and few studies have differentiated peer pressure from theoretically related constructs such as conformity or wanting to be popular. This study developed and validated short measures of peer pressure, peer conformity, and popularity in a sample (n = 148) of adolescent boys and girls in grades 11 to 13. All measures constructed for the study were internally consistent. Although all measures of peer pressure, conformity and popularity were intercorrelated, peer pressure and peer conformity were stronger predictors of risk behaviors than measures assessing popularity, general conformity or dysphoria. Both peer pressure and peer conformity can be measured with short scales suitable for large-scale testing. Tables, appendix, references