RT Article
T1 An Examination of the Structural Properties of the Extremism Risk Guidelines (ERG22+): A Structured Formulation Tool for Extremist Offenders
JF Terrorism and political violence
VO 33
IS 6
SP 1141
OP 1159
A1 Powis, Beverly
A2 Randhawa, Kiran
A2 Bishopp, Darren
LA English
YR 2021
UL https://krimdok.uni-tuebingen.de/Record/1770925023
AB This paper explores the construct validity and structural properties of the ERG22+ formulation tool, used in the assessment of risk and need in extremist offenders. The ERG22+ was developed from a clinical perspective, and was based on the small number of case studies and limited research evidence that were available at the time. It suggests three domains relevant to risk, namely Engagement, Intent, and Capability. These were originally offered as a guide to risk formulation within a functional analysis framework, but were not empirically derived. The items within the ERG22+ are scored on ordinal ratings which offers the possibility to develop subscales within the tool, but the conceptual overlap across the domains offered suggests that these would not be empirically reproduced. In this paper the structural properties of the ERG22+ were examined through factor analysis and multidimensional scaling (MDS) to inform the development of measurement scales. The ERG22+ shows promise as a risk and need formulation tool, which could be developed further in light of the findings from this study. Issues of content validity and areas for further development are discussed.
K1 structural properties
K1 need assessment
K1 Islamism
K1 Validity
K1 Risk assessment
K1 Extremism
DO 10.1080/09546553.2019.1598392