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Appears in Collections:Psychology Journal Articles
Peer Review Status: Refereed
Title: Source accuracy data reveal the thresholded nature of human episodic memory
Authors: Harlow, Iain M
Donaldson, David
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Keywords: Human memory
Episodic memory
Signal detection theory
Issue Date: Apr-2013
Publisher: Springer
Citation: Harlow IM & Donaldson D (2013) Source accuracy data reveal the thresholded nature of human episodic memory, Psychonomic Bulletin and Review, 20 (2), pp. 318-325.
Abstract: Episodic recollection supports conscious retrieval of past events. It is unknown why recollected memories are often vivid, but at other times we struggle to remember. Such experiences might reflect a recollection threshold: Either the threshold is exceeded and information is retrieved, or recollection fails completely. Alternatively, retrieval failure could reflect weak memory: Recollection could behave as a continuous signal, always yielding some variable degree of information. Here we reconcile these views, using a novel source memory task that measures retrieval accuracy directly. We show that recollection is thresholded, such that retrieval sometimes simply fails. Our technique clarifies a fundamental property of memory and allows responses to be accurately measured, without recourse to subjective introspection. These findings raise new questions about how successful retrieval is determined and why it declines with age and disease.
Type: Journal Article
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Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: University of Edinburgh

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