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Masked and unmasked electrophysiological repetition effects of famous faces.
Brain Res. 2006 Sep 13; 1109(1):146-57.BR

Abstract

We investigated immediate repetition effects of sequentially presented famous face pairs. The first face (F1) was presented masked or unmasked and preceded the second face (F2) with different SOAs (84 ms vs. 500 ms). Participants judged F2 with regard to either semantic category (actor vs. singer; indirect task) or perceptual match with F1 (same vs. different; direct task). Repetition shortened RT for unmasked but not for masked F1 conditions. In event-related brain potentials (ERPs), unmasked repetition effects were influenced by task and SOA and consisted a modulation of an occipitotemporal N170, an inferior temporal N250r (200-300 ms), a central-parietal N400 (300-500 ms), and a parietal P600 (500-800 ms). An early occipital negativity (onset approximately 100 ms) was present at the 84-ms SOA but diminished in the 500-ms SOA condition, probably reflecting a fast decaying iconic memory trace. Masked repetition effects in the indirect task were limited to a significant early (100-150 ms) prefrontal/lateral frontal and central-parietal modulation, and a strong trend for a reduced N170 amplitude. This suggests that masked repetition modulated early visual processing but did not influence processes beyond approximately 200 ms that reflect the access to facial representations and semantic information for people.

Authors+Show Affiliations

Department of Psychology, University of Glasgow, 58 Hillhead Street, Glasgow, G12 8QB, UK. ulla.martens@freenet.deNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16872582

Citation

Martens, Ulla, et al. "Masked and Unmasked Electrophysiological Repetition Effects of Famous Faces." Brain Research, vol. 1109, no. 1, 2006, pp. 146-57.
Martens U, Schweinberger SR, Kiefer M, et al. Masked and unmasked electrophysiological repetition effects of famous faces. Brain Res. 2006;1109(1):146-57.
Martens, U., Schweinberger, S. R., Kiefer, M., & Burton, A. M. (2006). Masked and unmasked electrophysiological repetition effects of famous faces. Brain Research, 1109(1), 146-57.
Martens U, et al. Masked and Unmasked Electrophysiological Repetition Effects of Famous Faces. Brain Res. 2006 Sep 13;1109(1):146-57. PubMed PMID: 16872582.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Masked and unmasked electrophysiological repetition effects of famous faces. AU - Martens,Ulla, AU - Schweinberger,Stefan R, AU - Kiefer,Markus, AU - Burton,A Mike, Y1 - 2006/07/26/ PY - 2005/10/11/received PY - 2006/04/13/revised PY - 2006/06/16/accepted PY - 2006/7/29/pubmed PY - 2006/11/1/medline PY - 2006/7/29/entrez SP - 146 EP - 57 JF - Brain research JO - Brain Res VL - 1109 IS - 1 N2 - We investigated immediate repetition effects of sequentially presented famous face pairs. The first face (F1) was presented masked or unmasked and preceded the second face (F2) with different SOAs (84 ms vs. 500 ms). Participants judged F2 with regard to either semantic category (actor vs. singer; indirect task) or perceptual match with F1 (same vs. different; direct task). Repetition shortened RT for unmasked but not for masked F1 conditions. In event-related brain potentials (ERPs), unmasked repetition effects were influenced by task and SOA and consisted a modulation of an occipitotemporal N170, an inferior temporal N250r (200-300 ms), a central-parietal N400 (300-500 ms), and a parietal P600 (500-800 ms). An early occipital negativity (onset approximately 100 ms) was present at the 84-ms SOA but diminished in the 500-ms SOA condition, probably reflecting a fast decaying iconic memory trace. Masked repetition effects in the indirect task were limited to a significant early (100-150 ms) prefrontal/lateral frontal and central-parietal modulation, and a strong trend for a reduced N170 amplitude. This suggests that masked repetition modulated early visual processing but did not influence processes beyond approximately 200 ms that reflect the access to facial representations and semantic information for people. SN - 0006-8993 UR - https://www.unboundmedicine.com/medline/citation/16872582/Masked_and_unmasked_electrophysiological_repetition_effects_of_famous_faces_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0006-8993(06)01874-9 DB - PRIME DP - Unbound Medicine ER -