P1: FQJ/FNV P2: FNN
Sexual Abuse: A Journal of Research and Treatment [saj] PL101-171 March 14, 2000 9:42 Style ﬁle version Nov. 19th, 1999
Sexual Abuse: A Journal of Research and Treatment, Vol. 12, No. 2, 2000
Psychometric Analysis of the Sexual Interest
Laura A. Holland,
Stacey C. Zolondek,
Gene G. Abel,
Alan D. Jordan,
and Judith V. Becker
Reliability, measured by Cronbach’s coefﬁcient alpha, and concurrent validity,
measured by Pearson’s r and polychoric correlation coefﬁcients, were evaluated
in this study. A sample of 371 sexual offenders referred to the Behavioral Medicine
Institute of Atlanta for evaluation of sexual interests and behaviors by the courts
were assessed using the Sexual Interest Cardsort Questionnaire (SI), a self-report
measure of deviant and nondeviant sexual interest, as well as indicator variables
obtained from classiﬁcations assigned by clinicians as a result of 2 hour-long,
semistructured clinical interviews. Internal consistency of 75 items from the SI
ranged from 0.71 to 0.96, across 15 categories of sexual interest and behavior.
Additionally, the SI was shortened utilizing Cronbach’s alphas to maintain a high
level of internal consistency. The resulting questionnaire, the shortened SI (SIS),
had 45 items and 15 categories. Cronbach’s alpha ranged from 0.78 to 0.97. Uti-
lizing Pearson’s r and polychoric correlation coefﬁcients, signiﬁcant correlations
were found for the 11 sexually deviant categories of the SI and indicator vari-
ables, and the 10 sexually deviant categories of the SIS and indicator variables.
The SI and SIS showed a high level of reliability and concurrent validity. Clinical
and research issues pertaining to the clinical assessment of male sexual offend-
ers utilizing self-report and clinical interview data, both obtained as the result of
comprehensive evaluations, are discussed.
KEY WORDS: male sex offenders; self-report; clinical assessment; deviant sexual interest.
Behavioral Medicine Institute of Atlanta, 1401 Peachtree Street, Suite 140, Atlanta, Georgia 30309.
Emory University, Atlanta, Georgia.
Department of Psychology, Arizona Health Sciences Center, University of Arizona, Tucson, Arizona.
To whom correspondence should be addressed.
2000 Plenum Publishing Corporation