Background and objectives: Research indicates the presence of both explicit and implicit memory biases for threat. However, empirical support for the presence of memory biases related to symmetry, ordering and arranging is lacking, despite the fact that many individuals report anxiety associated with their personal belongings being out of place. The aim of this experiment was to examine memory biases for disorderliness and their associations with symmetry, ordering and arranging symptoms.

Methods: Eighty undergraduate participants were assigned to one of four conditions, consisting of rooms in which objects were arranged according to different levels of disorderliness (orderly, slightly disorderly, slightly orderly, and disorderly). Participants next completed a memory task in which their memory for disordered vs. ordered objects was assessed. Measures of OCD symptoms, preference for symmetry, OCD belief domains, anxiety and depression were completed.

Results: Analyses indicated that participants in the slightly disorderly condition showed significantly better recall and recognition for the disordered items than for the ordered items, and that those in the slightly orderly condition showed the same pattern in recall, but not recognition. No associations were found between a preference for symmetry and memory biases.

Limitations: The sample scored particularly low on our measure of symptoms of preference for symmetry, compromising the generalizability of our results.

Conclusions: Findings provide evidence for a general memory bias for disorderliness, although this bias does not appear to be associated with symmetry, ordering and arranging symptoms. Results are discussed from a cognitive-behavioural perspective with the consideration of feelings of incompleteness.