Perceptual and conceptual priming in patients with dissociative identity disorder

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Abstract

The present study examined implicit memory transfer in patients with dissociative identity disorder (DID). To determine priming impairments in DID, we included both several perceptual priming tasks and a conceptual priming task using neutral material. We tested a large sample of DID patients (n = 31), in addition to 25 controls and 25 DID simulators, comparable on sex, age, and education. Controls replicated conceptual priming results of Vriezen, Moscovitch, and Bellos (1995) by showing that conceptual priming seems to require the formation of domain-specific semantic representations, denoting either sensory or functional object attributes. We extended a study performed by Schacter, Cooper, and Delaney (1990) by demonstrating priming for impossible objects using the sensitive priming index of response times. The simulators in the study were not able to simulate interidentity amnesia on the implicit memory tasks employed. Partly in contrast to participants in previous studies, DID patients showed evidence of perceptual priming as well as conceptual priming comparable to that of controls. DID patients thus displayed normal implicit memory performance.

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Huntjens, R. J. C., Postma, A., Hamaker, E. L., Woertman, L., Van Der Hart, O., & Peters, M. (2002). Perceptual and conceptual priming in patients with dissociative identity disorder. Memory and Cognition, 30(7), 1033–1043. https://doi.org/10.3758/BF03194321

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