Violence and Victims, Volume 21, Number 5, October 2006  2006 Springer Publishing Company 539 “If I Can’t Have You, No One Can”: Development of a Relational Entitlement and Proprietariness Scale (REPS) Annegret F. Hannawa, MA Brian H. Spitzberg, PhD Liesbeth Wiering, MA San Diego State University San Diego, CA Christy Teranishi, PhD Texas A&M International University Laredo, TX Relational proprietariness and entitlement have been theoretically related to partner vio- lence following the threat of relationship dissolution. To date, however, no measure has been employed to verify such accounts. A multistage item pool development and refine- ment strategy was employed, resulting in a 32-item measure with strong construct validity. An online survey administered to 279 students resulted in an interpretable factor structure of sexual proprietariness and entitlement, consisting of social, behavioral, and information control, and a potential factor of face threat reactivity. These factors added unique variance to the prediction of instrumental and expressive aggression, were related to self-esteem and attachment, and were not contaminated by social desirability. Recommendations for bolstering the face threat reactivity factor and future studies are suggested. This measure provides a new tool that contributes to the prediction of intimate partner violence. Keywords: domestic violence; possessiveness; jealousy; proprietary beliefs; self-esteem; attachment I n the United States, about 900,000 intimate violent offenses against women occur each year. Approximately 1,300 women are victims of uxoricide, or intimate partner murder (Rennison & Welchans, 2000). Numerous studies have been conducted to examine the factors that relate to these acts of intimate violence. One of the few constructs that has been proposed as a precipitant of relational aggression is the threat, attempt, or act of leaving a romantic relationship (Brewer & Paulsen, 1999; Brewster, 2002; Campbell et al., 2003; Coleman, 1999; Davis, Ace, & Andra, 2000; Dearwater et al., 1998; Dutton & Kerry, 1999; Easteal, 1993; Farr, 2002; Fleury, Sullivan, & Bybee, 2000; Gentile, 2001; Hall, 1997; Johnson, 1995; Kennedy & Dutton, 1989; Kienlen, Birmingham, Solberg, O’Regan, & Meloy, 1997; Roberts, 2002; Serran & Firestone, 2004; Wallace, 1986). Del Ben and Fremouw (2002) found that in 70% of the cases of actual or attempted femicide, the victim had initiated relationship dissolution. In other words, research indicates that