Episodic context binding in task switching: Evidence from amnesia

Meier, Beat; Rey-Mermet, Alodie; Woodward, Todd S.; Müri, René; Gutbrod, Klemens (2013). Episodic context binding in task switching: Evidence from amnesia. Neuropsychologia, 51(5), pp. 886-892. Elsevier 10.1016/j.neuropsychologia.2013.01.025

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The purpose of the present study was to investigate whether amnesic patients show a bivalency effect. The bivalency effect refers to the performance slowing that occurs when switching tasks and bivalent stimuli appear occasionally among univalent stimuli. According to the episodic context binding account, bivalent stimuli create a conflict-loaded context that is re-activated on subsequent trials and thus it is assumed that it depends on memory binding processes. Given the profound memory deficit in amnesia, we hypothesized that the bivalency effect would be largely reduced in amnesic patients. We tested sixteen severely amnesic patients and a control group with a paradigm requiring predictable alternations between three simple cognitive tasks, with bivalent stimuli occasionally occurring on one of these tasks. The results showed the typical bivalency effect for the control group, that is, a generalized slowing for each task. In contrast, for amnesic patients, only a short-lived slowing was present on the task that followed immediately after a bivalent stimulus, indicating that the binding between tasks and context was impaired in amnesic patients.

Item Type: Journal Article (Original Article)
Division/Institute: 04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology
07 Faculty of Human Sciences > Institute of Psychology > Experimental Psychology and Neuropsychology
10 Strategic Research Centers > Center for Cognition, Learning and Memory (CCLM)
UniBE Contributor: Meier, Beat; Rey-Mermet, Alodie; Müri, René Martin and Gutbrod, Klemens
Subjects: 600 Technology > 610 Medicine & health
100 Philosophy > 150 Psychology
ISSN: 0028-3932
Publisher: Elsevier
Language: English
Submitter: Anna Maria Ruprecht
Date Deposited: 23 Apr 2014 14:08
Last Modified: 26 Jan 2015 05:11
Publisher DOI: 10.1016/j.neuropsychologia.2013.01.025
PubMed ID: 23395937
BORIS DOI: 10.7892/boris.45150
URI: http://boris.unibe.ch/id/eprint/45150

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