This study assessed memories for sexual trauma in a nontreatment-seeking sample of recent rape victims and considered competing explanations for failed recall. Participants were 92 female rape victims assessed within 2 weeks of the rape; 62 were also assessed 3 months postassault. Memory deficits for parts of the rape were common 2 weeks postassault (37%) but improved over the 3-month window studied (16% still partially amnesic). Hypotheses evaluated competing models of explanation that may account for reported recall deficits. Results are most consistent with information-processing models of traumatic memory.The nature of memories for traumatic events, particularly sexual trauma, has garnered considerable attention in popular (e.g., Begley, 1994;Fanning, 1995aFanning, , 1995bWoodward, 1993;, scholarly (e.g., Pope, 1996;Williams, 1994a;1994b), and legal arenas (Loftus, 1993). With some exceptions (e.g., Cloitre, Cancienne, Brodsky, Dulit, & Perry, 1996;Koss, Figueredo, Bell, Tharan, & Tromp, 1996;Tromp, Koss, Figueredo, & Tharan, 1995), the majority of the literature on traumatic memory falls loosely into one of three basic types: experimental trauma analogue or in situ field studies; studies of autobiographical memory for personally experienced traumas; and nonempirical clinical case reports. 1 Experimental analogue studies use college student and normal adult samples to compare memories for neutral events with memories for traumatic analogue events varying in their degree of arousal, emotional intensity, and personal impact. Despite strong internal validity and precise measures of recall accuracy, there are questions about whether memories for trauma analogue events generalize to memories for personally experienced traumatic events, particularly sexual trauma, which is not modeled in analogue studies.Offering greater ecological validity, research using nonexperimental or quasi-experimental paradigms in clinical or general population samples provides information about important qualities of autobiographical memory for personally experienced sexual trauma yet are limited by a host of factors. These include verifiability of memories, problems with retrospective recall, and a broad range of developmental and contextual influences among research participants at the time they experienced the trauma that may have differentially influenced encoding, storage, and retrieval of trauma memories.Copyright 1998 by the American Psychological Association, Inc.Correspondence concerning this article should be addressed to Mindy B. Mechanic, Department of Psychology, University of Missouri -St. Louis, 8001 Natural Bridge Road, St. Louis, Missouri 63121. Electronic mail may be sent to mbmechanic@umsl.edu. 1 For reviews of relevant literatures focusing on adults, see Christianson (1992aChristianson ( , 1992b, Heuer and Reisberg (1992), and Koss, Tromp and Tharan (1995). The literature on children's memory for traumatic events is beyond the scope of the present project.
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