Reliability and Predictive Validity of the Juvenile Sex Offender Assessment Protocol-II in an Australian Context

Timea Molnar; Troy Allard; Nadine McKillop; John Rynne

doi:10.1177/0306624X19900978

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Reliability and Predictive Validity of the Juvenile Sex Offender Assessment Protocol-II in an Australian Context

Journal article

Open access

Peer reviewed

Reliability and Predictive Validity of the Juvenile Sex Offender Assessment Protocol-II in an Australian Context

Timea Molnar, Troy Allard, Nadine McKillop and John Rynne

International Journal of Offender Therapy and Comparative Criminology, Vol.66(10-11), pp.1051-1070

2022

DOI: https://doi.org/10.1177/0306624X19900978

Appears in UniSC Diversity and Inclusion Research Collection

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Abstract

J-SOAP-II

Indigenous

youth

sexual

recidivism

reliability

predictive validity

UniSC Diversity Area - Life Stages

This study investigated the reliability and predictive validity of the Juvenile Sex Offender Assessment Protocol-II (J-SOAP-II), in an Australian context, and for Australian Indigenous and non-Indigenous youth. Participants were 123 (n = 91 non-Indigenous; n = 32 Indigenous) youth assessed using the J-SOAP-II and followed up over an average period of 4 years. The reliability of the J-SOAP-II was assessed using measures of internal consistency (Cronbach's alphas and inter-item correlations). Receiver operating characteristic (ROC) analyses were conducted to assess the J-SOAP-II's validity in predicting sexual and non-sexual (violent and non-violent) recidivism. Overall, the J-SOAP-II demonstrated moderate to high levels of reliability and weak to moderate levels of validity for predicting sexual and non-sexual (violent and non-violent) recidivism for the whole sample. While the J-SOAP-II total score was significantly associated with non-sexual (violent and non-violent) recidivism for non-Indigenous youth, it was not significantly associated with any of the outcome variables for Indigenous youth. Across all analyses, the dynamic scales of the J-SOAP-II predicted recidivism with greater accuracy than the static scales. However, the static scales had greater accuracy in predicting the risk of sexual recidivism for Indigenous youth. While a reliable measure, these preliminary findings raise questions about the validity of the J-SOAP-II for predicting sexual recidivism for Indigenous and non-Indigenous youth in an Australian context, and warrant further investigation.

Details

Title: Reliability and Predictive Validity of the Juvenile Sex Offender Assessment Protocol-II in an Australian Context
Authors: Timea Molnar (Corresponding Author) - Griffith University
Troy Allard (Author) - Griffith University
Nadine McKillop (Author) - University of the Sunshine Coast
John Rynne (Author) - Griffith University
Publication details: International Journal of Offender Therapy and Comparative Criminology, Vol.66(10-11), pp.1051-1070
Publisher: Sage Publications Inc.
Date published: 2022
DOI: 10.1177/0306624X19900978
ISSN: 0306-624X; 0306-624X
Grants: Understanding and preventing youth sexual violence and abuse: an investigation of offender development, offending onset, and progression, DP110102126, Australian Research Council (Australia, Canberra) - ARC
Organisation Unit: School of Law and Society; Sexual Violence Research and Prevention Unit; School of Law and Criminology - Legacy
Language: English
Record Identifier: 99451335402621
Output Type: Journal article

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Collaboration types: Domestic collaboration
Web Of Science research areas: Criminology & Penology; Psychology, Applied

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Source: InCites