Understanding Intimate Partner Sexual Assaults: Findings from Sexual Assault Kits

ABSTRACT

In 2013, Cuyahoga County, Ohio, began DNA testing and investigating nearly 5000 previously unsubmitted sexual assault kits (SAKs) from 1993 through 2009. We examined case files from a sample of SAKs that were tested but not previously adjudicated (n = 429). More than 10% (n = 45) involved victims who reported to police that a former or current intimate partner sexually assaulted them. This article integrates the available data on the offenders, the victims, the initial investigation, and the specifics of the assaults to provide a more complete understanding of intimate partner sexual assault (IPSA). More than one-third of the IPSA offenders were serial sex offenders; that is, the offenders sexually assaulted an intimate partner and another person(s). Comparing IPSAs to all other sexual assaults, IPSAs more frequently involved bodily force, less frequently involved a weapon, and IPSA investigations were more frequently closed because (1) the victims stated they lied or the police doubted the victims and (2) the victims declined to prosecute. The most common sequencing of events was a demand for sex by the offender followed by a verbal refusal by the victim and the use of bodily force in the sexual assault. The findings, however, indicate a great deal of variation in the sequencing of events surrounding the sexual assault, with over 25% involving no physical confrontation before or after the sexual assault and no demands for sex. Unsubmitted SAK data provide a unique window into understanding the understudied and underreported issue of IPSA.     

A differential outcomes effect using biologically neutral outcomes in delayed matching-to-sample with pigeons

The differential outcomes effect (DOE) pertains to enhanced conditional discrimination performance if each correct stimulus-choice sequence is always followed by a different outcome (e.g., food vs. water) compared to when each correct sequence is followed equally often by either outcome. The present experiments sought evidence of a DOE in pigeons, using biologically neutral outcomes. Experiment 1 replicated findings with rats demonstrating that a DOE can occur when one outcome is a biologically neutral light and the other is the absence of that light. Experiment 2 extended these findings by demonstrating a DOE when two biologically neutral outcomes of similar sensory and associative properties were employed.