This paper explored public willingness to act when exposed to cases of intimate partner violence against women, by analyzing the influence of perceived severity and personal responsibility on two types of responses: mediating and reporting to the police. Results (N = 419) yielded main effects of personal responsibility for both types of responses. No main effects of perceived severity were found. A significant interaction between perceived severity and personal responsibility was found only for reporting responses. Results are discussed in light of the helping behavior research tradition. Implications for public education and advocacy programs are also considered.