**Primary Aim** Determine whether people with SAD have significant variance in the relationship between anxiety and avoidance over time. **Secondary Aim** Determine whether said variance is a promising predictor of response to social anxiety exposure. **Rationale for the Selection of Outcome Measures** Most self-report measures are gold-standard measures of the construct in question and have been used in previous research on the same basic topic. The Ecological Momentary Assessment (EMA) questions were generated for this project. The anxiety questions consist of the face-valid “anxious” item plus the two psychometrically better-performing items from the Brief State Anxiety Measure (itself a collection of the better-performing items of the State Trait Anxiety Inventory). An alternative would be the social anxiety EMA items used by Kashdan et al. However, those items are based heavily on the Fear of Negative Evaluation scale, which is thought to assess a cognitive component of social anxiety. The Kashdan et al. items also contain “worry” in two items, raising the possibility they that may assess rumination about social situations rather than affective response. We therefore used our items, which focus on affective response alone. As of writing, we were unable to find an example of social avoidance EMA items. The selected items assess three domains of avoidance that our clinical experience suggests are common in people with SAD: Avoiding situations outright, fleeing situations that are encountered, and avoiding thinking about situations.