Development of the Social Issues Advocacy Scale-2 (SIAS-2)

The 21-item Social Issues Advocacy Scale (SIAS; Nilsson, Marszalek et al. in Educ Psychol Meas 71(1):258-275, 2011) was developed as a concise measure of social justice advocacy for people in the helping and health professions. Recent scholarship has indicated a need for a broader measure. The present study seeks to continue development of the SIAS into an expanded version, the SIAS-2. A sample of 284 helping and health professionals and college students in related fields was administered 117 items, which was reduced to 78 items for the final instrument through item analysis and exploratory factor analysis. Eight factors emerged explaining 61.5% of the item variance. Corresponding subscales ranged in reliability from .88 to .94. Additional validity evidence is discussed.