The traumatizing effect of rape and other forms of sexual assault on the victim has been documented in a variety of recent studies. The diversity of these studies with respect to their samples, data collection methods, and measurement procedures makes it difficult to specify with precision (1) the effect of rape on adult vs. child victims, and (2) the effect of rape vs. incestuous assault on child victims. Three comparison groups compose the focus of this study: adult rape victims, child rape victims, and child incest victims. This article deals with the levels of trauma stemming from sexual assault in these groups and the implications of these findings for sexual assault treatment centers. (Author abstract)