1. Initial Validity and Reliability of the Revised Sexual Experiences Scale in a Sample of College Men RaeAnn E. Anderson, Timothy J. Geier & Shawn P. Cahill, University of Wisconsin-Milwaukee Area: Sexual violence is a serious public health issue in the United States and especially on college campuses, where 1 in 4 college women have experienced some type of sexual assault. Compared to the literature on women’s experiences of sexual assault, very little is known about men who perpetrate sexual assault. Currently there is a dearth of empirically validated assessment tools specifically designed to measure perpetration of sexual assault, contributing to the practical difficulties of learning more about men who perpetrate sexual aggression. Purpose: The goal of this study is to evaluate the validity and reliability of the revised, short-form, Sexual Experiences Survey-Perpetration (SES-P). Participants: Participants were 188 undergraduate men, primarily Caucasian (75%). 80% of the sample identified their sexual orientation as heterosexual, 10% identified as their orientation as gay or homosexual. Less than half the sample reported their major as Psychology (32%). Method: College males were invited to participate in a two part anonymous web survey over the course of two weeks. The initial survey consisted of the measures designed to evaluate convergent and divergent reliability to the SES-P. The Conflict Tactics Scale-2 (CTS2) and Aggression Questionnaire (AQ) were given to evaluate convergent validity and, the SES-Victimization (SES-V), Childhood Trauma Questionnaire (CTQ), and Rape Empathy Scale (RES) to evaluate divergent validity. Two weeks later, participants were asked to complete the SES-P again to evaluate reliability. Results: Descriptive analyses: Utilizing the SES-P 13.8% (n = 26) of the sample reported engaging in some type of sexual aggression, the most common being unwanted sexual contact (13.8). 8.5% of the sample reported engaging in attempted or completed rape. Bivariate correlations were computed for the following results. Dichotomous coding for the presence or absence of sexual aggression was used unless otherwise noted. Convergent validity: SES-P and CTS2 past year sexual coercion scores were significantly correlated r(188) = 0.200, p = 0.013. SES-P and AQ total* scores were significantly correlated, r(178) = 0.234, p = 0.002 Divergent validity: SES-P and SES-V lifetime scores were significantly correlated r(188) = 0.324, p < 0.0001 SES-P and CTQ-Sexual Abuse* scores were not significantly related. SES-P and RES scores were significantly correlated, r(188) = 0.169, p =.026 Reliability: SES-P Time 1 and Time 2 scores were significantly correlated r(188)=0.429, p < 0.001. *a continuous scoring system was used for the CTQ & AQ, per the original instrument Discussion: This study demonstrates that college men are willing to report on their experiences of sexual aggression; the prevalence rates found in this study are similar to those found in other studies in this population. Results indicates that the SES-P demonstrates both validity and reliability. However, it is notable that the correlation between the SES-P and CTS2 was relatively low, indicating significant level of unshared variance. This may be due to the differing approaches to measuring consent utilized by these two measures. Additionally, test-retest reliability was relatively low and much lower than previous versions of this instrument (Koss & Gidycz, 1985). Further research should focus on the construct validity of this measure to investigate what elements of the measure may be leading to lower validity and reliability. References: Koss, M. P., & Gidycz, C. A. (1985). Sexual Experiences Survey: Reliability and validity. Journal of Consulting and Clinical Psychology, 53(3), 422-423. doi: 10.1037/0022-006x.53.3.422