The present study investigated whether implicit social motives and cognitive power-sex associations would predict self-reports of aggressive sexual behavior. Participants wrote stories in response to Thematic Apperception Test pictures, which were scored for power and affiliation-intimacy motives. They also completed a lexical-decision priming task that provided an index of the strength of the cognitive association between the concepts of "power" and "sexuality." For men, high levels of power motivation and strong power-sex associations predicted more frequent aggression. There was also an interaction: Power motivation was unrelated to aggression for men with the weakest power-sex associations. For women, high levels of affiliation-intimacy motivation were associated with more frequent aggression. Strong power-sex associations were also predictive for women but only when affiliationintimacy motivation was high.Sexual aggression is a widespread problem with devastating consequences for both victims and society at large. In a recent ~review, Koss (1993) stated that estimates of the prevalence of rape in adult women range from 14% to 25% in most studies; 1997 statistics from the National Center for Health Statistics (Abma, Chandra, Mosher, Peterson, & Piccinino, 1997) fall within that range, with 20% of women reporting ever having been forced to have intercourse. The personal consequences to the victim of an assault are often severe (for reviews, see Koss, 1993;Koss, Heise, & Russo, 1994;and Resick, 1993). These consequences include depression (Wyatt, 1992), posttraumatic stress disorder (Solomon & Davidson, 1997), general ill health (Golding, Cooper, & George, 1997), and increased risk for suicide (Davidson, Hughes, George, & Blazer, 1996). Other forms of coercive sexuality, such as sexual Eileen L. Zurbriggen, Department of Psychology, New York University. Portions of this research were presented at the meeting of the Society for the Psychological Study of Social Issues, Ann Arbor, Michigan, June 1998; at the 21st Annual Scientific Meeting of the International Society of Political Psychology, Montreal, Quebec, Canada, July 1998; and at the 106th Annual Convention of the American Psychological Association, San Francisco, California, August 1998. This article is based on a portion of my doctoral dissertation, submitted to the University of Michigan, which was supported by National Institute of Mental Health (NIMH) Individual National Research Service Award F31MH11468, a University of Michigan Rackham Dissertation/Thesis Grant, and grants from the University of Michigan Psychology Department. Preparation of the article was supported by NIMH Institutional National Research Service Award T32MH19890.I gratefully acknowledge the advice and support of my dissertation committee: Elizabeth Anderson; David Meyer; Abigail Stewart; and especially my advisor, David Winter. I also thank Ted Sturman for assistance with coding and Lauren Duncan, Rowell Huesmann, Aurora Sherman, Patrick Shrout, Eric Stone, Larissa Tiedens, and Jul...