Universität zu Köln

Brocher, Andreas and Graf, Tim ORCID: 0000-0002-1592-8624 (2016). Pupil old/new effects reflect stimulus encoding and decoding in short-term memory. Psychophysiology, 53 (12). S. 1823 - 1836. HOBOKEN: WILEY. ISSN 1469-8986

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Abstract

We conducted five pupil old/new experiments to examine whether pupil old/new effects can be linked to familiarity and/or recollection processes of recognition memory. In Experiments 1-3, we elicited robust pupil old/new effects for legal words and pseudowords (Experiment 1), positive and negative words (Experiment 2), and low-frequency and high-frequency words (Experiment 3). Importantly, unlike for old/new effects in ERPs, we failed to find any effects of long-term memory representations on pupil old/new effects. In Experiment 4, using the words and pseudowords from Experiment 1, participants made lexical decisions instead of old/new decisions. Pupil old/new effects were restricted to legal words. Additionally requiring participants to make speeded responses (Experiment 5) led to a complete absence of old/new effects. Taken together, these data suggest that pupil old/new effects do not map onto familiarity and recollection processes of recognition memory. They rather seem to reflect strength of memory traces in short-term memory, with little influence of long-term memory representations. Crucially, weakening the memory trace through manipulations in the experimental task significantly reduces pupil/old new effects.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Brocher, Andreas UNSPECIFIED UNSPECIFIED UNSPECIFIED Graf, Tim UNSPECIFIED orcid.org/0000-0002-1592-8624 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-255072
DOI:	10.1111/psyp.12770
Journal or Publication Title:	Psychophysiology
Volume:	53
Number:	12
Page Range:	S. 1823 - 1836
Date:	2016
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1469-8986
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language EVENT-RELATED POTENTIALS; VISUAL WORD RECOGNITION; BRAIN POTENTIALS; RECOLLECTIVE EXPERIENCE; HIGH-FREQUENCY; REACTION-TIME; SIZE CHANGES; FAMILIARITY; ERP; RESPONSES Multiple languages Psychology, Biological; Neurosciences; Physiology; Psychology; Psychology, Experimental Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/25507