Iowa State Study on Recidivism

This paper describes the development, reliability, and validity of the Minnesota Sex
Offender Screening Tool – Revised (MnSOST-R), as well as recommended risk levels and cut
scores. Variables from multiple dimensions, both static and dynamic, were reviewed for inclusion in
the MnSOST-R. Final items were selected and scored empirically based on clearly defined criteria.
The resulting 16 items that comprise the MnSOST-R maximize the positive predictive power of the
tool, and perform significantly better than previous versions of the MnSOST. This newest version
correlate achieves impressive hit rates with rapists and extrafamilial sex offenders, the population for
which the instrument was developed. Very high true positive rates were achieved depending on the
selected cut score.

IA State Study

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