Prediction of Self-Regulation Model Pathways of Sexual Offending Using the MMPI-2-RF

People who commit sexual offenses are a heterogenous population. Earlier models of sex offender treatment programs relied on a one-size-fits all approach based on relapse prevention models. Newer models emphasize client similarities and differences, and tailor treatment recommendations to individual needs. The Ward Hudson Self-Regulation Model of Sexual Offending (SRM) classifies people into categories based on goal type (acquisition or inhibitory) and ability to self-regulate. The aim of the current study was to determine if Minnesota Multiphasic Personality Inventory – 2 – Restructured Form (MMPI-2-RF) profiles can differentiate people based upon SRM pathway assignment, and use scale scores to predict pathway membership. Archival data, including MMPI-2 protocols, were collected from former male inpatients (N = 122) at a sex offender treatment program. MMPI-2 protocols were converted into MMPI-2-RF profiles for analysis. Although multivariate analysis of variance and independent samples t-tests did not reveal statistically significant scale mean differences based on SRM pathway assignment, moderate effect sizes were observed when comparing means across all four pathways (h2p ≥ .06 on Fs, RC4, GIC, NFC, MSF, and JCP), approach versus avoidant pathways (d ≥ .5 on FBS-r, RC4, SUB, and FML), and regulated versus underregulated pathways (d ≥ .5 on Fs, RC1, GIC, NUC, and NFC). Results of binary logistic regression did not support the hypotheses that scales measuring lack of control (i.e., RCd, DISC-r, and NFC) and scales measuring somatization (i.e., RC1, GIC, NUC, and NEGE-r) added incrementally to the prediction of assignment to an underregulated pathway. Results offer partial support for objective psychological testing (i.e., MMPI-2-RF) as a source of information when determining pathway assignment. Limitations of the current study and future directions for research are addressed