1 Journal of Applied Biobehavioral Research, 2001, 6, 1, pp. 1-26. Copyright  2001 by Bellwether Publishing, Ltd. All rights reserved. An Examination of Transtheoretical Predictors of Condom Use in Late-Adolescent Heterosexual Men 1 SETH M. NOAR, 2 PATRICIA J. MOROKOFF, AND COLLEEN A. REDDING Department of Psychology and Cancer Prevention Research Center University of Rhode Island The purpose of the current study was to examine Transtheoretical Model (TTM) predic- tors of condom use in heterosexual men and to test the applicability of additional predic- tors of condom use (condom attitudes and interpersonal processes). Participants were 168 sexually active undergraduate men. Multiple regression analyses indicated that pros, con- dom self-efficacy, condom attitudes, and processes of change were significant predictors of condom use. Several variables added unique variance above and beyond others, and a final model accounted for 55% of the variance in condom use. Results underscore the importance of TTM variables and interpersonal processes such as partner support in het- erosexual men. Suggestions for how these variables might be incorporated into interven- tions aimed at increasing condom use are discussed. Consistent condom use is the primary way for heterosexually active men and women to protect themselves from sexually transmitted diseases (STDs) includ- ing HIV and AIDS. However, studies indicate that the majority of late-adolescent heterosexuals are not using condoms consistently (Grimley, Prochaska, Velicer, & Prochaska, 1995; Hollar & Snizek, 1996; Lewis, Malow, & Ireland, 1997). This is alarming given the fact that both adolescents and young adults are at con- siderably higher risk for contracting STDs than are older adults (Centers for Dis- ease Control and Prevention, 2000). Furthermore, at least 12 million, and perhaps as many as 15 million, new STD infections occur each year in the United States (Cates, 1999). These figures have not changed in more than a decade (Cates, 1999), suggesting a need for new approaches to both understanding and interven- ing on risky sexual behavior. 1 This study was based on a Master’s Thesis awarded to the first author by the University of Rhode Island. Portions of this research were presented at the 106th Annual Convention of the Ameri- can Psychological Association, San Francisco, California; the 20th Annual Scientific Sessions of the Society of Behavioral Medicine, San Diego, California. Thanks are extended to Dominic Valentino and Alexa Albert for their contributions to this work, as well as to the anonymous reviewers who pro- vided insightful comments on this manuscript. Seth M. Noar is now in the Department of Communi- cation at the University of Kentucky. 2 Correspondence concerning this article should be addressed to Seth M. Noar, HIV Prevention Research, University of Kentucky, 312 Breckinridge Hall, Lexington, KY 40506-0056. E-mail: snoar2@uky.edu