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Screening and Diagnostic Validity of Affinity 2.5Stephenson, Heather Lynn 28 August 2014 (has links) (PDF)
Affinity 2.5 is a computer-based instrument designed to assess sexual interest using viewing-time measures. Viewing-time measures of sexual interest have been developed to identify individuals with deviant sexual interest. The purpose of this study is to examine the validity of Affinity 2.5 in screening and diagnosing individuals with sexually deviant interests. This study used viewing time profiles of known sexual offenders compared to norm-referenced profiles of an exclusively heterosexual, non-pedophilic college population. Participants were 155 males and 3 females who had sexually offended against children and 63 male and 84 female non-offender college students. Results show that 43.7% of offenders were correctly identified as having significantly deviant sexual interest, compared to the reference group. Further 12.0% of offenders showed statistical significant interest in at least one category of individuals from a protected population and offended against that same category. The results of this study do not provide support for the utility of the Affinity 2.5 as a screening or diagnostic tool.
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Reliability and a Measure of Sexual Interest: Examining the Temporal Stability of Scores on Affinity 2.5Hansen, Kristina S. Withers 13 July 2011 (has links) (PDF)
Affinity 2.5 is a computer-based instrument designed to measure sexual interest using viewing time of images depicting fully-clothed males and females of different ages. Participants are asked to rate the sexual attractiveness of the person in the image according to a 15-point scale while their viewing time of each image is surreptitiously monitored. The validity of viewing time as a measure of sexual interest is based on social cognition theory and is established in the review of literature. The number of images comprising Affinity 2.5 represents a 42.9% increase from the previous version of the assessment, Affinity 2.0. The purpose of this study was to examine the temporal stability of scores on Affinity 2.5 for a sample of exclusively heterosexual, nonpedophilic males and females. Viewing time data from 63 males and 84 females were analyzed using a chi-square procedure. Results of this analysis indicate that 86% of responses from the male participants and 88% of responses from the female participants were consistent from time one to time two. As suspected, these percentages represent an increase in reliability over the temporal stability of the shorter Affinity 2.0.
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