Social anxiety is related to impaired ability to filter out irrelevant information but not reduced storage capacity.

Individuals with social anxiety have deficits in inhibiting task-irrelevant threatening information, but the mechanism is poorly understood. In this study, we instructed participants with high and low social anxiety to perform a variant change-detection task, recording their accuracy and electrophysiological data. The results indicated that individuals with high social anxiety showed impaired ability to filter out irrelevant information in disgust facial expression condition rather than neutral facial expression. While individuals with low social anxiety didn't show filter efficiency defects under both disgust and neutral facial expressions. Furthermore, we found high socially anxious individuals could hold more information in visual working memory than low socially anxious individuals. These results suggest that the abundance of cognitive resources in socially anxious individuals compensates the presumed weak performance in accuracy produced by impaired filter efficiency. These results provide support for the claims of efficiency and effectiveness in attentional control theory.