Psychological Assessment (Aug 2, 2018). DOI:10.1037/pas0000601 The Social Interaction Anxiety Scale (SIAS) and Social Phobia Scale (SPS) are 20-item companion measures of social anxiety symptoms frequently used to evaluate outcome in treatment trials. The SIAS-6, SPS-6, and Social Interaction Phobia Scale (SIPS) are promising short forms of the SIAS and SPS. The current study evaluated whether it is sound to use these short scales instead of the full-length instruments to measure outcome in social anxiety disorder (SAD) treatment studies, using data from a trial in which 255 adults with SAD were treated with traditional or imagery-enhanced group cognitive–behavioral therapy.. Please contact the library to request a copy of this article - http://bit.ly/1Xyazai