Psychometric properties of the Spanish version of the activism and radicalism intention scale / Propiedades psicométricas de la versión española de la escala de intención de activismo y radicalismo

Abstract The purpose of this study is to adapt the Activism and Radicalism Intention Scale to Spanish. To do so, two studies were performed. In the first, which had a sample of 514 participants, the instrument was adapted to Spanish and a confirmatory factorial analysis was conducted. The psychometric results obtained were similar to those of the original version, and the scale’s two-dimensional structure was replicated. In the second study, the psychometric characteristics of the original instrument were also replicated, but in this case with a sample of 133 participants comprised of sympathizers and activists in the 15-M anti-austerity movement. Regarding the validity of the scale, both studies provide evidence on the coherence of the construct in terms of both its internal structure and its theoretical relationship with other psychosocial variables. The reliability of the instrument obtained in both samples studied was acceptable. In short, this study presents a tool in Spanish which can be useful for studying individuals’ and groups’ predisposition towards more or less violent political mobilization.