Extremism Risk Guidance 22+: An exploratory psychometric analysis
This report describes a study that aimed to explore the validity and reliability of the Extremism Risk Guidance 22+ assessment.
Applies to England and Wales
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The Extremism Risk Guidance 22+ (ERG 22+) is a structured professional judgement assessment designed to inform operational decisions for individuals with extremism-related convictions, regardless of ideology. Previous Ministry of Justice studies have indicated that the ERG 22+ broadly measures what it is intended to measure and is used consistently across different cases and by different assessors. The aim of this study was to re-assess the ERG 22+’s validity (the soundness of its structure and content) and reliability (its ability to produce consistent results over repeated uses) using a newer and larger sample of cases.
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