Relationship between Disgust and Memory Biases in Spider Fear.

The literatures examining disgust's role in information processing biases and evidence for memory biases in anxiety disorders are both mixed, suggesting small or fragile effects. Thus, to maximize power and reliability, a mega-analytic approach was used to examine data across two studies to determine whether a memory bias for spider-relevant information exists under conditions when disgust is elevated and if the bias is specific to highly fearful individuals. Disgust was manipulated by having a large tarantula present or absent (at encoding and/or at recall) when individuals high (N=158) or low (N=108) in spider fear completed a free recall task. Results indicated that, as expected, the spider's presence was related to enhanced recall of spider information. However, this bias was driven by the presence of the spider during encoding only (as opposed to during recall), and high trait spider fear was not necessary for the memory bias to be expressed. Finally, there was a small effect for individual differences in trait and state disgust to predict spider recall, but this effect disappeared when anxiety was also included as a predictor, suggesting only a limited role for disgust in memory biases related to specific fears.