Document Detail


Source accuracy data reveal the thresholded nature of human episodic memory.
MedLine Citation:
PMID:  23192370     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
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.
Authors:
Iain M Harlow; David I Donaldson
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-29
Journal Detail:
Title:  Psychonomic bulletin & review     Volume:  -     ISSN:  1531-5320     ISO Abbreviation:  Psychon Bull Rev     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9502924     Medline TA:  Psychon Bull Rev     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Neuroinformatics Doctoral Training Centre, University of Edinburgh, Edinburgh, Scotland, imharlow@ucdavis.edu.
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