Offender Assessment System and Offender Group Reconviction Scale: Research Summaries.

Published: Dec 2009

Ministry of Justice

OASys is an IT-based risk and needs assessment tool; OGRS is a risk assessment measure used to predict the likelihood of reoffending. The OASys Data Evaluation and Analysis Team carried out research over a three-year period on the reliability and validity of OASys as an evidence-based assessment, and separate research was done to update OGRS to reflect changing patterns of offending.

The eight research summaries describe the findings from the different studies.