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Assessing recollection and familiarity of similar lures in a behavioral pattern separation task

Assessing recollection and familiarity of similar lures in a behavioral pattern separation task The relationship between recollection‐mediated recognition memory and behavioral pattern separation is poorly understood. In two separate experiments, we modified a well‐validated object discrimination task with previously demonstrated sensitivity to neural pattern separation with instructions to assess recollection and familiarity. In the first experiment, we included a Remember/Know (R/K) judgment, and in the second we included a source memory judgment. We found that both “Remember” and correct source judgments were higher for lures labeled “similar” (where pattern separation is engaged) but also higher on lures called “old” (where pattern separation is absent), suggesting that false alarms in pattern separation tasks are frequently mediated by recollection. As one might expect, “Remember” judgments and correct source decisions increased with greater dissimilarity for “similar” responses and increased with greater similarity for “old” responses. This suggests that recollection can occur in the presence and in the absence of pattern separation and that false alarms to similar lures are not simply driven by familiarity. © 2013 Wiley Periodicals, Inc. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Hippocampus Wiley

Assessing recollection and familiarity of similar lures in a behavioral pattern separation task

Hippocampus , Volume 23 (4) – Apr 1, 2013

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References (66)

Publisher
Wiley
Copyright
Copyright © 2013 Wiley Periodicals, Inc.
ISSN
1050-9631
eISSN
1098-1063
DOI
10.1002/hipo.22087
pmid
23401187
Publisher site
See Article on Publisher Site

Abstract

The relationship between recollection‐mediated recognition memory and behavioral pattern separation is poorly understood. In two separate experiments, we modified a well‐validated object discrimination task with previously demonstrated sensitivity to neural pattern separation with instructions to assess recollection and familiarity. In the first experiment, we included a Remember/Know (R/K) judgment, and in the second we included a source memory judgment. We found that both “Remember” and correct source judgments were higher for lures labeled “similar” (where pattern separation is engaged) but also higher on lures called “old” (where pattern separation is absent), suggesting that false alarms in pattern separation tasks are frequently mediated by recollection. As one might expect, “Remember” judgments and correct source decisions increased with greater dissimilarity for “similar” responses and increased with greater similarity for “old” responses. This suggests that recollection can occur in the presence and in the absence of pattern separation and that false alarms to similar lures are not simply driven by familiarity. © 2013 Wiley Periodicals, Inc.

Journal

HippocampusWiley

Published: Apr 1, 2013

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