This study analyzes sexual-preference profiles in a sample of 420 sexual aggressors who exhibited a valid profile during their initial phallometric assessment. The sexual stimuli used in the process were audiotapes describing sexual-offending scenarios. Two types of sexual stimuli sets were used: one developed for sexual aggressors against women and a second developed for sexual aggressors against children. Penile responses were recorded during stimulus presentation using a mercury-in-rubber strain gauge. Classification analyses (hierarchical and K-means clustering combination) were conducted separately for three groups of sexual aggressors: (a) sexual aggressors against children (n = 253), (b) sexual aggressors against women (n = 138), and (c) mixed sexual aggressors (n = 29). The sexual aggressors against children exhibited four penile-response profiles, the sexual aggressors against women two penile-response profiles, and the mixed sexual aggressors only one penile-response profile. In addition, analyses carried out on randomly split subsamples established that the generated profiles for sexual aggressors against children and sexual aggressors against women were stable.
Abel, G.G., Barlow, D.H., Blanchard, E.B., & Guild, D. ( 1977). The components of rapists sexual arousal. Archives of General Psychiatry, 34, 895-903.
2.
Abel, G.G., Becker, J.V., Blanchard, E.B., & Djenderedjian, A. (1978). Differentiating sexual aggressives with penile measures. Criminal Justice and Behavior , 5, 315-332.
3.
Abel, G.G., Becker, J.V., & Cunningham-Rathner, J. (1984). Complications, consent, and cognitions in sex between children and adults. International Journal of Law and Psychiatry, 7, 89-103.
4.
Abel, G.G., Becker, J.V., Cunningham-Rathner, J., Mittelman, M., & Rouleau, J. ( 1988). Multiple paraphilic diagnoses among sex offenders. Bulletin of the American Academy of Psychiatry and the Law, 16, 153-168.
5.
American Psychiatric Association. (1980). Diagnostic and statistical manual of mental disorders (3rd ed.). Washington, DC: Author .
6.
American Psychiatric Association. (1994). Diagnostic and statistical manual of mental disorders (4th ed.). Washington, DC: Author .
7.
Bancroft, J., Jones, H.G., & Pullen, B.R. ( 1966). A simple transducer for measuring penile erection with comments on its use in the treatment of sexual disorders. Behaviour Research and Therapy, 4, 230-241.
8.
Barbaree, H.E. ( 1990). Stimulus control of sexual arousal: its role in sexual assault. In W. L. Marshall, D. R. Laws, & H. E. Barbaree (Eds.), Handbook of sexual assault: Issues, theories, and treatment of the offender (pp. 115-142). New York: Plenum Press.
9.
Barbaree, H.E., & Marshall, W.L. (1989). Erectile responses among heterosexual child molesters, father-daughter incest offenders, and matched non-offenders: Five distinct age preference profiles. Canadian Journal of Behavioural Science, 21, 70-82.
10.
Barbaree, H.E., & Marshall, W.L. (1991). The role of male sexual arousal in rape: Six models. Journal of Consulting and Clinical Psychology, 59, 621-630.
11.
Barbaree, H.E., Marshall, W.L., & Lanthier, R.D. (1979). Deviant sexual arousal in rapists. Behaviour Research and Therapy, 17, 215-222.
12.
Barbaree, H.E., & Mewhort, D.J.K. (1994). The effects of the z-score transformations on measures of relative erectile response strength: A re-appraisal . Behaviour Research and Therapy, 32, 547-558.
13.
Barsetti, I., Earls, C., Lalumière, M.L., & Bélanger, N. (1998). The differentiation of intrafamilial and extrafamilial heterosexual child molesters. Journal of Interpersonal Violence, 13, 275-286.
14.
Baxter, D.J., Barbaree, H.E., & Marshall, W.L. (1986). Sexual responses to consenting and forced sex in a large sample of rapists and nonrapists. Behaviour Research and Therapy, 24, 513-520.
15.
Baxter, D.J., Marshall, W.L., Barbaree, H.E., Davidson, P.R., & Malcolm, P.B. ( 1984). Deviant sexual behavior: Differentiating sex offenders by criminal and personal history, psychometric measures, and sexual response . Criminal Justice and Behavior, 11, 477-501.
16.
Beauregard, E., Lussier, P., & Proulx, J. ( 2001, November). Factors related to deviant sexual preferences in rapists. Paper presented at the annual meeting of the American Society of Criminology, Atlanta, GA.
17.
Belsley, D.A., Kuh, E., & Welsch, R.E. ( 1980). Regression diagnostics: Identifying influential data and sources of collinearity. New York: John Wiley.
18.
Blanchard, R., & Barbaree, H.E. (2005). The strength of sexual arousal as a function of the age of the sex offender: Comparisons among pedophiles, hebephiles, and teleiophiles. Sexual Abuse: A Journal of Research and Treatment, 17, 441-456.
19.
Blanchard, R., Klassen, P., Dickey, R., Kuban, M.E., & Blak, T. ( 2001). Sensitivity and specificity of the phallometric test for pedophilia in nonadmitting sex offenders. Psychological Assessment, 13, 118-126.
20.
Blanchard, R., Kuban, M.E., Blak, T., Cantor, J.M., Klassen, P., & Dickey, R. ( 2006). Phallometric comparison of pedophilic interest in nonadmitting sexual offenders against stepdaughters, biological daughters, other biologically related girls, and unrelated girls. Sexual Abuse: A Journal of Research and Treatment, 18, 1-14.
21.
Blanchard, R., Lykins, A.D., Wherrett, D., Kuban, M.E., Cantor, J.M., Blak, T., Dickey, R., & Klassen, P.E. ( 2009). Pedophilia, hebephilia, and the DSM-V. Archives of Sexual Behavior, 38, 335-350.
22.
Castonguay, L.G., Proulx, J., Aubut, J., McKibben, A., & Campbell, M. ( 1993). Sexual preference assessment of sexual aggressors: Predictors of penile response magnitude. Archives of Sexual Behavior , 22, 325-334.
23.
Chaplin, T.C., Rice, M.E., & Harris, G.T. ( 1995). Salient victim suffering and the sexual responses of child molesters. Journal of Consulting and Clinical Psychology , 63, 249-255.
24.
Cohen, J. ( 1988). Statistical power analysis for the behavioral sciences (2nd ed.). Hillsdale, NJ: Erlbaum.
25.
Earls, C.M. ( 1988). Aberrant sexual arousal in sexual offenders. Annals of the New York Academy of Sciences, 528, 41-48.
26.
Earls, C.M., & Jackson, D.R. ( 1981). The effects of temperature on the mercury-in-rubber strain gauge. Behavioral Assessment, 3, 145-149.
27.
Earls, C.M., & Proulx, J. ( 1986). The differentiation of francophone rapists and nonrapists using penile circumferential measures. Criminal Justice and Behavior, 13, 419-429.
28.
Earls, C.M., Quinsey, V.L., & Castonguay, L.G. (1987). A comparison of three methods of scoring penile circumference changes. Archives of Sexual Behavior, 16, 493-500.
29.
Eccles, T. ( 1990). The clinical utility of the Rape Index. Unpublished doctoral dissertation, Queen’s University, Kingston, Ontario, Canada.
30.
Freund, K. ( 1965). Diagnosing heterosexual pedophilia by means of a test for sexual interest. Behaviour Research and Therapy, 3, 229-234.
31.
Freund, K. ( 1967). Erotic preference in pedophilia. Behaviour Research and Therapy, 5, 339-348.
32.
Freund, K. ( 1981). Assessment of pedophilia. In M. Cook & K. Howells (Eds.), Adult sexual interest in children (pp. 139-179). New York: Academic Press.
33.
Freund, K., & Blanchard, R. ( 1989). Phallometric diagnosis of pedophilia. Journal of Consulting and Clinical Psychology, 57, 100-105.
34.
Freund, K., Sedlacek, F., & Knob, K. ( 1965). A simple transducer for mechanical plethysmography of the male genital. Journal of Experimental Analysis of Behavior , 8, 169-170.
35.
Freund, K., Sher, H., Racansky, I.G., Campbell, K., & Heasman, G. ( 1986). Males disposed to commit rape. Archives of Sexual Behavior, 15, 23-25.
36.
Freund, K., & Watson, R.J. ( 1991). Assessment of the sensitivity and specificity of a phallometric test: An update of phallometric diagnosis of pedophilia. Psychological Assessment, 3, 254-260.
37.
Geer, J.H., & Fuhr, R. ( 1976). Cognitive factor in sexual arousal: The role of distraction . Journal of Consulting and Clinical Psychology, 44, 238-243.
38.
Hanson, R.K., & Morton-Bourgon, K. (2005). Predicting relapse: A meta-analysis of sexual offender recidivism studies. Journal of Consulting and Clinical Psychology, 66, 348-362.
39.
Hanson, R.K., & Slater, S. ( 1988). Sexual victimization in the history of child sexual abusers: A review. Annals of Sex Research, 1, 485-499.
40.
Hanson, R.K., & Thornton, D. ( 1999). Static-99: Improving actuarial risk assessments for sex offenders (User Report no. 02). Ottawa, Canada: Department of the Solicitor General of Canada.
Kalmus, E., & Beech, A.R. ( 2005). Forensic assessment of sexual interest: A review. Aggression and Violent Behaviour, 10, 193-218.
46.
Keenan, T., & Ward, T. ( 2000). A theory of mind perspective on cognitive, affective, and intimacy deficits in child sexual offenders. Sexual Abuse: A Journal of Research and Treatment, 12, 49-60.
47.
Kuban, M., Barbaree, H.E., & Blanchard, R. ( 1999). A comparison of volume and circumference phallometry: Response magnitude and method agreement. Archives of Sexual Behavior, 28, 345-359.
48.
Lalumière, M.L., & Quinsey, V.L. ( 1994). The discriminability of rapists from non-sex offenders using phallometric measures: A meta-analysis. Criminal Justice and Behavior, 21, 150-175.
49.
Lang, R.A., Black, E.L., Frenzel, R.R., & Checkley, K.L. (1988). Aggression and erotic attraction toward children in incestuous and pedophilic men. Annals of Sex Research, 1, 417-441.
50.
Langevin, R., Bain, J., Ben-Aron, M.H., Coulthard, R., Day, D., Roper, V., et al. (1985). Sexual aggression: Constructing a predictive equation. In R. Langevin (Ed.), Erotic preference, gender identity and aggression in men: New research studies (pp. 39-76). Mahwah, NJ: Lawrence Erlbaum.
51.
Leclerc, B., & Proulx, J. ( 2006). La pléthysmographie pénienne chez les agresseurs sexuels [Penile plethysmography in sexual aggressors]. In T. Pham (Ed.), L’évaluation diagnostique des agresseurs sexuels [Diagnostic assessment of sexual aggressors] (pp. 137-159). Liege, Belgium: Mardaga.
52.
Leech, N.L., Barrett, K.C., & Morgan, G.A. ( 2005). SPSS for intermediate statistics: Use and interpretation (2nd ed.). Mahwah, NJ: Lawrence Erlbaum.
53.
Looman, J. ( 1989). Rapists / pedophiles: A distinct group? Unpublished honours thesis, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
54.
Looman, J., Abracen, J., Maillet, G., & DiFazio, R. ( 1998). Phallometric nonresponding in sexual offenders. Sexual Abuse: A Journal of Research and Treatment, 10, 325-336.
55.
Lussier, P., Beauregard, E., & Proulx, J. ( 2001, November). Deviant sexual preferences for violent and non-violent sexual interactions in child molesters. Paper presented at the annual meeting of the American Society of Criminology , Atlanta, GA.
56.
Lussier, P., Beauregard, E., Proulx, J., & Nicole, A. ( 2005). Developmental factors related to deviant sexual preferences in child molesters. Journal of Interpersonal Violence, 20, 999-1017.
57.
Malcolm, B. ( 1992). Rapists assessment data from the Sex Offender Treatment Program of the Regional Treatment Centre, Kingston. Unpublished manuscript.
58.
Malcolm, P.B., Andrews, D.A., & Quinsey, V.L. ( 1993). Discriminant and predictive validity of phallometrically measured sexual age and gender preference. Journal of Interpersonal Violence, 8, 486-501.
59.
Marshall, W.L. ( 1988). The use of sexually explicit stimuli by rapists, child molesters and nonoffenders. Journal of Sex Research, 25, 267-288.
60.
Marshall, W.L. ( 1989). Invited essay: Intimacy, loneliness and sexual offenders . Behaviour Research and Therapy, 27, 491-503.
61.
Marshall, W.L., Barbaree, H.E., & Butt, J. ( 1988). Sexual offenders against male children: Sexual preferences . Behavior Research and Therapy, 26, 383-391.
62.
Marshall, W.L., Barbaree, H.E., & Christophe, D. (1986). Sexual offenders against female children: Sexual preferences for age of victims and type of behaviour . Canadian Journal of Behavioural Science, 18, 424-439.
63.
Marshall, W.L., & Fernandez, Y.M. (2003). Phallometric testing with sexual offenders: Theory, research and practice. Brandon, VT: Safer Society Press.
64.
McConaghy, N. ( 1967). Penile volume change to moving pictures of male and female nudes in heterosexual and homosexual males. Behaviour Research and Therapy, 5, 43-48.
65.
Proulx, J., Aubut, J., McKibben, A., & Côté, M. (1994). Penile responses of rapists and nonrapists to rape stimuli involving physical violence or humiliation . Archives of Sexual Behavior, 23, 295-310.
66.
Proulx, J., Côté, G., & Achille, P.A. ( 1993). Prevention of voluntary control of penile responses in homosexual pedophiles during phallometric testing. Journal of Sex Research, 30, 140-147.
67.
Quinsey, V.L., & Chaplin, T.C. ( 1982). Penile responses to nonsexual violence among rapists . Criminal Justice and Behavior, 9, 372-384.
68.
Quinsey, V.L., & Chaplin, T.C. ( 1984). Stimulus control of rapists’ and non-sex offenders’ sexual arousal. Behavioral Assessment, 6, 169-176.
69.
Quinsey, V.L., & Chaplin, T.C. ( 1988a). Penile responses of child molesters and normals to descriptions of encounters with children involving sex and violence. Journal of Interpersonal Violence, 3, 259-274.
70.
Quinsey, V.L., & Chaplin, T.C. ( 1988b). Preventing faking in phallometric assessments of sexual preference. Annals of the New York Academy of Sciences, 528, 49-58.
71.
Quinsey, V.L., Chaplin, T.C., & Carrigan, W.F. (1979). Sexual preferences among incestuous and non-incestuous child molesters. Behavior Therapy , 10, 562-565.
72.
Quinsey, V.L., Chaplin, T.C., & Upfold, D. ( 1984). Sexual arousal to nonsexual violence and sadomasochistic themes among rapists and non-sex-offenders. Journal of Consulting and Clinical Psychology, 52, 651-657.
73.
Quinsey, V.L., Chaplin, T.C., & Varney, G. ( 1981). A comparison of rapists and non-sex offenders sexual preferences for mutually consenting sex, rape, and physical abuse of women . Behavioral Assessment, 3, 127-135.
74.
Quinsey, V.L., & Laws, D.R. ( 1990). Validity of physiological measures of pedophilic sexual arousal in a sexual offender population: A critique of Hall, Proctor, and Nelson. Journal of Consulting and Clinical Psychology, 58, 886-888.
75.
Quinsey, V.L., Steinman, C.M., Bergensen, S.G., & Holmes, T.F. ( 1975). Penile circumference, skin conductance and ranking of child molesters and normals to sexual and non sexual visual stimuli. Behaviour Therapy, 6, 213-219.
76.
Rice, M.E., Chaplin, T.C., Harris, G.T., & Coutts, J. ( 1994). Empathy for the victim and sexual arousal among rapists and nonrapists. Journal of Interpersonal Violence, 9, 435-449.
77.
Rosen, R.C., & Keefe, F.J. ( 1978). The measurement of human penile tumescence. Psychophysiology, 15, 366-376.
78.
Serin, R.C., Malcolm, P.B., Khanna, A., & Barbaree, H.E. (1994). Psychopathy and deviant sexual arousal in incarcerated sexual offenders. Journal of Interpersonal Violence, 9, 3-11.
79.
Smallbone, S.W., & Dadds, M.R. ( 1998). Childhood attachment and adult attachment in incarcerated adult male sex offenders. Journal of Interpersonal Violence , 13, 555-573.
80.
SPSS Inc. (2001). The SPSS two-step cluster component (Technical report no. TSCWP-0101). Chicago: Author.
Tybout, A., Sternthal, B., Keppel, G., Verducci, J., Meyers-Levy, J., Barnes, J., et al. (2001). Analysis of variance. Journal of Consumer Psychology, 10, 5-35.
83.
Wydra, A., Marshall, W.L., Earls, C.M., & Barbaree, H.E. (1983). Identification of cues and control of sexual arousal by rapists. Behaviour Research and Therapy, 21, 469-476.
