Wegner DM, Erber R, Raymond P. Transactive memory in close relationships. Journal of Personality and Social Psychology. 1991 Dec; 61(6): 923-9.
Memory performance of 118 individuals who had been in close dating relationships for at least 3 months was studied. For a memory task ostensibly to be performed by pairs, some Ss were paired with their partners and some were paired with an opposite-sex partner from another couple. For some pairs a memory structure was assigned (e.g., 1 partner should remember food items, another should remember history items, etc.), whereas for others no structure was mentioned. Pairs studied together without communication, and recall was tested in individuals. Memory performance of the natural pairs was better than that of impromptu pairs without assigned structure, whereas the performance of natural pairs was inferior to that of impromptu pairs when structure was assigned.
PMID: 1774630 [PubMed - indexed for MEDLINE]