The Validity of the Assessment and Treatment of Radicalization Scale: A Psychometric Instrument for Measuring Severity of Extremist Muslim Beliefs

The Assessment and Treatment of Radicalization Scale (ATRS) is designed to quantitatively measure Muslim extremists’ ideologies regarding risk areas that are reported in the literature. Utilizing the scale, in this study, using a convenience sample of 1769 from 10 countries (Australia, Canada, Egypt, India, Iran, Iraq, Nigeria, Pakistan, Spain, and South Africa) responded to the ATRS. Results supported previous findings about the reliability and validity of the Assessment and Treatment of Radicalization Scale (ATRS, formerly known as Belief Diversity Scale BDS, Loza, 2007) for assessing Muslim extremists. Suggested cut off scores to use for identifying possible extremists are provided