Research and analysis
Inter-rater reliability of the Extremism Risk Guidelines 22+ (ERG 22+)
This study examines the Inter-rater reliability of the Extremism Risk Guidelines (ERG22+), which has been in use across Her Majesty’s Prison and Probation Service of England and Wales since 2011.
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The study examined two approaches to Inter-rater reliability of the ERG 22+; it examined research reliability, which tested reliability in ‘research’ conditions between expert raters, and field reliability which tested reliability among practitioners using the measure in the field.