ERP 'old/new' effects: memory strength and decisional factor(s)

Finnigan, Simon, Humphreys, Michael S., Dennis, Simon and Geffen, Gina (2002) ERP 'old/new' effects: memory strength and decisional factor(s). Neuropsychologia, 40 13: 2288-2304. doi:10.1016/S0028-3932(02)00113-6

Author Finnigan, Simon
Humphreys, Michael S.
Dennis, Simon
Geffen, Gina
Title ERP 'old/new' effects: memory strength and decisional factor(s)
Journal name Neuropsychologia   Check publisher's open access policy
ISSN 0028-3932
Publication date 2002
Sub-type Article (original research)
DOI 10.1016/S0028-3932(02)00113-6
Volume 40
Issue 13
Start page 2288
End page 2304
Total pages 17
Place of publication Oxford
Publisher Pergamon-elsevier Science Ltd
Language eng
Subject 170101 Biological Psychology (Neuropsychology, Psychopharmacology, Physiological Psychology)
Abstract Event-related potentials (ERPs) were recorded while subjects made old/new recognition judgments on new unstudied words and old words which had been presented at study either once ('weak') or three times ('strong'). The probability of an 'old' response was significantly higher for strong than weak words and significantly higher for weak than new words. Comparisons were made initially between ERPs to new, weak and strong words, and subsequently between ERPs associated with six strength-by-response conditions. The N400 component was found to be modulated by memory trace strength in a graded manner. Its amplitude was most negative in new word ERPs and most positive in strong word ERPs. This 'N400 strength effect' was largest at the left parietal electrode (in ear-referenced ERPs). The amplitude of the late positive complex (LPC) effect was sensitive to decision accuracy (and perhaps confidence). Its amplitude was larger in ERPs evoked by words attracting correct versus incorrect recognition decisions. The LPC effect had a left > right, centro-parietal scalp topography (in ear-referenced ERPs). Hence, whereas, the majority of previous ERP studies of episodic recognition have interpreted results from the perspective of dual-process models, we provide alternative interpretations of N400 and LPC old/new effects in terms of memory strength and decisional factor(s). (C) 2002 Elsevier Science Ltd. All rights reserved.
Keyword Behavioral Sciences
Psychology, Experimental
Single-process Models
Event-related Potentials
High-frequency Words
Dual-process Model
Recognition Memory
Brain Potentials
Electrophysiological Evidence
Process Dissociation
Explicit Memory
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Psychology Publications
Centre for Advanced Imaging Publications
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Citation counts: TR Web of Science Citation Count  Cited 89 times in Thomson Reuters Web of Science Article | Citations
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Created: Mon, 13 Aug 2007, 13:17:48 EST