Attitude Toward Sexual Aggression Against Women (ASAW) Scale: Evidence of Discriminant and Incremental Validity

We tested the discriminant and incremental validity of scores on the Attitude toward Sexual Aggression against Women (ASAW) scale, a self-report measure that asks men to evaluate (very bad to not at all bad) a range of sexually aggressive behaviors against women. An online panel of 647 men completed the ASAW scale and self-report measures of other offense-supportive cognitions (rape myth acceptance, cognitive distortions, and beliefs regarding rape) and sexually aggressive behavior (past sexual aggression, likelihood of engaging in sexually aggressive behavior, and likelihood to rape). We hypothesized that (a) the ASAW would be distinct from other measures of offense-supportive cognition and (b) the ASAW would be independently associated with sexual aggression after accounting for the other measures. Supportive of discriminant validity, exploratory factor analyses revealed that ASAW items clustered together to form a distinct factor from other measures of offense-supportive cognition. Supportive of incremental validity, hierarchical multiple regression analyses indicated that the ASAW explained an additional 5% of the variance in past sexually aggressive behavior (ΔR² = .05, <i>p</i> < .006) and 4-6% of the variance in likelihood of engaging in sexual aggression (ΔR² = .04-.06, <i>p</i> < .006) after accounting for other measures of offense-supportive cognition. If future research finds further support for the construct validity of its scores, the ASAW should be used to study the potential causal role that attitudes may play in sexual aggression against women, and whether changing them can reduce the likelihood of engaging in this type of behavior.