L. Maaike Helmus - Publications

L. Maaike Helmus Portrait

Publications in Refereed Journals


Hanson, R. K., Helmus, L., & Harris, A. J. R. (in press). Assessing the risk and needs of supervised sexual offenders: A prospective study. Criminal Justice and Behavior.

Helmus, L. M., & Thornton, D. (2015). Stability, predictive, and incremental accuracy of the individual items of Static-99R and Static-2002R in predicting sexual recidivism: A meta-analysis. Criminal Justice and Behavior. Advance online publication. doi:10.1177/0093854814568891

Hanson, R. K., Thornton, D., Helmus, L., & Babchishin, K. M. (2015). What sexual recidivism rates are associated with Static-99R and Static-2002R scores? Sexual Abuse: A Journal of Research and Treatment. Advance online publication. doi:10.1177/1079063215574710

Brouillette-Alarie, S., Babchishin, K. M., Hanson, R. K., & Helmus, L. M. (2015). Latent constructs of static risk scales for the prediction of sexual recidivism: A 3-factor solution. Assessment. Advance online publication. doi:10.1177/1073191114568114

Hilton, N. Z., Scurich, N., & Helmus, L. M. (2015). Communicating the risk of violent and offending behavior: Review and introduction to special issue. Behavioral Sciences and the Law, 33, 1-18. doi:10.1002/bsl.2160

Helmus, L., Ó Ciardha, C., & Seto, M. C. (2015). The Screening Scale for Pedophilic Interests (SSPI): Construct, predictive, and incremental validity. Law and Human Behavior, 39, 35-43. doi.10.1037/lhb0000099

Helmus, L., & Thornton, D. (2014). The MATS-1 risk assessment scale: Summary of methodological concerns and an empirical validation. Sexual Abuse: A Journal of Research and Treatment. Advance online publication. doi.10.1177/1079063214529801

Helmus, L., Hanson, R. K., Babchishin, K. M., & Thornton, D. (2014). Sex offender risk assessment with the Risk Matrix 2000: Validation and guidelines for combining with the STABLE-2007. Journal of Sexual Aggression. Advance online publication. doi:10.1080/13552600.2013.870241

Hanson, R. K., Harris, A. J. R., Helmus, L., & Thornton, D. (2014). High risk sex offenders may not be high risk forever. Journal of Interpersonal Violence, 29, 2792–2813. doi:10.1177/0886260514526062

Helmus, L., Babchishin, K. M., & Hanson, R. K. (2013). The predictive accuracy of the Risk Matrix 2000: A meta-analysis. Sexual Offender Treatment, 8(2), 1-24.

Helmus, L., Hanson, R. K., Babchishin, K. M., & Mann, R. E. (2013). Attitudes supportive of sexual offending predict recidivism: A meta-analysis. Trauma, Violence, and Abuse, 14, 34-53. doi:10.1177/1524838012462244

Serin, R. C., Lloyd, C. D., Helmus, L., Derkzen, D. M., & Luong, D. (2013). Does intra-individual change predict offender recidivism? Searching for the Holy Grail in a review of offender programming. Aggression and Violent Behavior, 18,32-53. doi:10.1016/j.avb.2012.09.002

Hanson, R. K., Babchishin, K. M., Helmus, L., & Thornton, D. (2013). Quantifying the relative risk of sex offenders: Risk ratios for Static-99R. Sexual Abuse: A Journal of Research and Treatment, 25, 482-515. doi:10.1177/1079063212469060

Babchishin, K. M., Hanson, R. K., & Helmus, L. (2012). Communicating risk for sex offenders: Risk ratios for Static-2002R. Sexual Offender Treatment, 7(2), 1-12.

Babchishin, K. M., Hanson, R. K., & Helmus, L. (2012). Even highly correlated measures can add incrementally to actuarial risk prediction. Assessment, 19, 442-461. doi:10.1177/1073191112458312

Montana, S., Thompson, G., Ellsworth, P. J., Lagan, H., Helmus, L., & Rhoades, C. J. (2012). Predicting relapse for Catholic clergy sex offenders: The use of Static-99. Sexual Abuse: A Journal of Research and Treatment, 24, 575-590. doi:10.1177/1079063212445570

Helmus, L., Hanson, R. K., Thornton, D., Babchishin, K. M., & Harris, A. J. R. (2012). Absolute recidivism rates predicted by Static-99R and Static-2002R sex offender risk assessment tools vary across samples: A meta-analysis. Criminal Justice & Behavior, 39, 1148-1171. doi:10.1177/0093854812443648

Hanson, R. K., Lloyd, C. D., Helmus, L., & Thornton, D. (2012). Developing non-arbitrary metrics for risk communication: Percentile ranks for the Static-99/R and Static-2002/R sexual offender risk tools. International Journal of Forensic Mental Health, 9, 11-23. doi:10.1080/14999013.2012.667511

Helmus, L., Babchishin, K. M., & Blais, J. (2012). Predictive accuracy of dynamic risk factors for Aboriginal and non-Aboriginal sex offenders: A comparison using STABLE-2007. International Journal of Offender Therapy and Comparative Criminology, 56, 856-876. doi:10.1177/0306624X11414693

Babchishin, K. M., Blais, J. & Helmus, L. (2012). Do static risk factors predict differently for Aboriginal sex offenders? A multi-site comparison using the original and revised Static-99 and Static-2002 scales. Canadian Journal of Criminology and Criminal Justice, 54, 1-43. doi:10.3138/cjccj.2010.E.40

Helmus, L., Thornton, D., Hanson, R. K., & Babchishin, K. M. (2012). Improving the predictive accuracy of Static-99 and Static-2002 with older sex offenders: Revised age weights. Sexual Abuse: A Journal of Research and Treatment, 24, 64-101. doi:10.1177/1079063211409951

Olver, M. E., Preston, D. L., Camilleri, J. A., Helmus, L., & Starzomski, A. (2011). A survey of clinical psychology training in Canadian federal corrections: Implications for psychologist recruitment and retention. Canadian Psychology, 52, 310-320. doi:10.1037/a0024586

Helmus, L., Babchishin, K. M., Camilleri, J.A., & Olver, M. E. (2011). Forensic psychology opportunities in Canadian graduate programs: An update of Simourd and Wormith’s (1995) survey. Canadian Psychology, 52, 122-127. doi:10.1037/a0023176

Helmus, L., & Bourgon, G. (2011). Taking stock of 15 years of research on the Spousal Assault Risk Assessment guide (SARA): A critical review. International Journal of Forensic Mental Health, 10, 64-75. doi:10.1080/14999013.2010.551709

Hanson, R. K., Helmus, L., & Thornton, D. (2010). Predicting recidivism amongst sexual offenders: A multi-site study of Static-2002. Law and Human Behavior, 34, 198-211. doi:10.1007/s10979-009-9180-1

Hanson, R. K., Bourgon, G., Helmus, L., & Hodgson, S. (2009). The principles of effective correctional treatment also apply to sexual offenders: A meta-analysis. Criminal Justice and Behavior, 36, 865-891. doi:10.1177/0093854809338545

Helmus, L. M. D., & Hanson, R. K. (2007). Predictive validity of the Static-99 and Static-2002 for sex offenders on community supervision. Sexual Offender Treatment, 2(2), 1-14. Available from http://www.sexual-offender-treatment.org/60.0.html

Manuscripts Submitted for Publication


Hermann, C. A., McPhail, I. V., Helmus, L., & Hanson, R. K. (2014). Correlates of emotional congruence with children in sexual offenders against children: An expanded test of theoretical models with a community sample. Submitted to International Journal of Offender Therapy and Comparative Criminology
Status: Awaiting decision

Babchishin, K. M., & Helmus, L. (2014). Problems with using correlations for dichotomous variables: An evaluation of proposed solutions with real-world data. Submitted to Behavior Research Methods
Status: Revised and resubmitted.

Helmus, L., & Babchishin, K. (2014). What statistics should we use to evaluate the information provided by risk scales? Submitted to Journal of Threat Assessment and Management.
Status: Awaiting decision.

Lehmann, R. J. B., Thornton, D., Helmus, L. M., & Hanson, R. K. (2014). Developing non-arbitrary metrics for risk communication: Norms for the Risk Matrix 2000. Submitted to Law and Human Behavior.
Status: Revising and resubmitting.

Helmus, L. M., & Forrester, T. (2014). Validation of the Static Factors Assessment (SFA) risk scale for federally sentenced offenders in Canada. Canadian Journal of Criminology and Criminal Justice.
Status: Awaiting decision.

Completed Manuscripts Awaiting Government Approval to Submit for Publication


Helmus, L. M., Perley-Robertson, B., & Forth, A. (2014). Predictive accuracy of static risk factors for Aboriginal offenders compared to non-Aboriginal offenders.
Likely journal for submission: Psychology, Crime, and Law.

Ternes, M., Helmus, L. M, & Forrester, T. (2014). How are temporary absences and work releases being used with Canadian federal offenders?
Likely journal for submission: Canadian Journal of Criminology and Criminal Justice.

Helmus, L. M., & Ternes, M. (2014). Temporary absences and work releases in Canada reduce unemployment and reoffending: Evidence for dosage effects.
Likely journal for submission: Psychology, Public Policy, and Law

Book Chapters

Lehmann, R. J. B., Fernandez, Y., & Helmus, L. M. (in press). Strengths of actuarial risk assessment. In D. R. Laws and W. O’Donahue (Eds.), Treatment of sex offenders: Strengths and weaknesses in assessment and intervention. New York: Springer.

Helmus, L., Hanson, R. K., & Babchishin, K. M. (in press). Sex offender base rates of sexual recidivism after controlling for Static-99/R. In A. Phenix & H. M. Hoberman (Eds.), Sexual offending: Predisposing conditions, assessments, and management. Springer.

Helmus, L., Hanson, R. K., & Morton-Bourgon, K. E. (2011). International comparisons of the validity of actuarial risk tools for sexual offenders, with a focus on Static-99. In D. P. Boer, L. A. Craig, R. Eher, M. H. Miner, & F. Pfafflin (Eds.), International perspectives on the assessment and treatment of sexual offenders: Theory, practice, and research (pp. 57-83). Chichester, West Sussex, U.K.: Wiley.

Other Peer-Reviewed


Elliott, I. A., Babchishin, K., Hermann, C. A., Helmus, L., McPhail, I., Ó Ciardha, C., Gillespie, S., Woods, M., McManus, M., Bartels, R., Alleyne, E., & Harkins, L. (2013). How many people can fit in a pair of Spanx? Textile durability, effectiveness, and girth in shapewear. Journal of Irreproducible Results, 52(2), 8-13.

Other non-Refereed Publications


Phenix, A., Helmus, L., & Hanson, R. K. (2015). Static-99R and Static-2002R Evaluator’s Workbook. Available from www.static99.org

Helmus, L., & Hanson, R. K. (2013). STABLE-2007: Updated recidivism rates (includes combinations with Static-99R, Static-2002R, and Risk Matrix 2000). Ottawa, ON: Public Safety Canada.

Phenix, A., Helmus, L., & Hanson, R. K. (2012). Static-99R and Static-2002R Evaluator’s Workbook. Available from www.static99.org

Helmus, L., & Hanson, R. K. (2011). More fun with statistics! How to use logistic regression to predict criminal recidivism risk. Crime Scene, 18(2), 7-12.

Serin, R. C., Lloyd, C. D., Helmus, L., Derkzen, D., & Luong, D. (2010). Assessment and conceptual issues in understanding offender change (Cooperative Agreement 08 PEI22GJX3). National Institute of Corrections.

Thornton, D., Hanson, R. K., & Helmus, L. (2010, Spring). Moving beyond the standard model for actuarial assessment for sexual offenders. Perspectives: Quarterly Newsletter of the California Coalition on Sexual Offending, p. 1-4. Available from http://www.ccoso.org/newsletter.php

Blais, J., Helmus, L., & Babchishin, K. M. (2010). Risk assessment with Aboriginal sex offenders. Crime Scene, 17(2), 20-21. Available from http://www.cpa.ca/docs/file/Sections/Criminal%20Justice%20Psychology/Crime%20Scene%20October%202010.pdf

Helmus, L., Hanson, R. K., & Thornton, D. (2009). Reporting Static-99 in light of new research on recidivism norms. The Forum, 21(1), p. 38-45.

Helmus, L., Babchishin, K., Hanson, R. K., & Thornton, D. (2009). Static-99R: Revised age weights. Available from http://www.static99.org/pdfdocs/static-99randage20091005.pdf

Helmus, L., Babchishin, K., Hanson, R. K., & Thornton, D. (2009). Static-2002R: Revised age weights. Available from http://www.static99.org/pdfdocs/static-2002rrevisedageweights.pdf

Helmus, L. (2008). Structured guidelines for evaluating study quality. In G. Bourgon, R. K. Hanson, J. D. Pozzulo, K. E. Morton Bourgon, & C. L. Tanasichuk (Eds.), The proceedings of the 2007 North American Correctional and Criminal Justice Psychology Conference (pp. 12-15; User Report 2008-02). Ottawa, ON: Public Safety Canada.

Helmus, L. (2008). Advice for finding a thesis supervisor: What professors have to say. Crime Scene, 15(2), 38-40. Available from http://www.cpa.ca/cpasite/userfiles/Documents/Criminal%20Justice/Crime%20Scene%202008-10.pdf

Helmus, L. (2008). Annotated bibliography of Static-99 replication studies. Available from http://www.static99.org/pdfdocs/static-99annotatedbibliography.pdf

Government Reports


Helmus, L., & Forrester, T. (in press). Static Factors Assessment in the offender intake assessment process: Relationships to releases and community outcomes (Research Report R-339). Ottawa, ON: Correctional Service of Canada.

Helmus, L., Johnson, S., & Harris, A. J. R. (2014). Developing the Risk of Administrative Segregation Tool (RAST) to predict admissions to segregation (Research Report R-325). Ottawa, ON: Correctional Service of Canada.

Helmus, L., & Forrester, T. (2014). Construct validity of the Static Factors Assessment in the offender intake assessment process (Research Report R-309). Ottawa, ON: Correctional Service of Canada.

Dunbar, L., & Helmus, L. (2014). Unlawfully at large: A profile of federal offenders who breach conditional release (Research Report R-271). Ottawa, ON: Correctional Service of Canada. Available from research@csc-scc.gc.ca

Helmus, L., Thornton, D., Hanson, R. K., & Babchishin, K. M. (2011). Assessing the risk of older sex offenders: Developing the Static-99R and Static-2002R (Corrections Research User Report No. 2011-01). Ottawa, ON: Public Safety Canada.

Babchishin, K. M., Hanson, R. K., & Helmus, L. (2011). The RRASOR, Static-99R and Static-2002R all add incrementally to the prediction of recidivism among sex offenders (Corrections Research User Report No. 2011-02). Ottawa, ON: Public Safety Canada.

Phenix, A., Doren, D., Helmus, L., Hanson, R. K., & Thornton, D. (2009). Static-2002 coding rules (Corrections Research User Report). Ottawa, ON: Public Safety Canada.

Hanson, R. K., Bourgon, G., Helmus, L., & Hodgson, S. (2009). A meta-analysis of the effectiveness of treatment for sexual offenders: Risk, need, and responsivity (Corrections Research User Report No. 2009-01). Ottawa, ON: Public Safety Canada.

Hanson, R. K., Helmus, L., & Bourgon, G. (2007). The validity of risk assessments for intimate partner violence: A meta-analysis (User Report No. 2007-07). Ottawa, ON: Public Safety Canada.

Hanson, R. K., Harris, A. J. R., Scott, T.-L., & Helmus, L. (2007). Assessing the risk of sexual offenders on community supervision: The Dynamic Supervision Project (User Report No. 2007-05). Ottawa, ON: Public Safety Canada.

Theses


Helmus, L. (2009). Re-norming Static-99 recidivism estimates: Exploring base rate variability across sex offender samples (Master’s thesis). Available from ProQuest Dissertations and Theses database. (UMI No. MR58443)

Helmus, L. (2007). A multi-site comparison of the validity and utility of the Static-99 and Static-2002 for risk assessment with sexual offenders. Honours thesis, Carleton University, Ottawa, Canada.