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Reversal negativity and bistable stimuli: Attention, awareness, or something else?




TekijätIntaite M, Koivisto M, Ruksenas O, Revonsuo A

KustantajaACADEMIC PRESS INC ELSEVIER SCIENCE

Julkaisuvuosi2010

JournalBrain and Cognition

Tietokannassa oleva lehden nimiBRAIN AND COGNITION

Lehden akronyymiBRAIN COGNITION

Numero sarjassa1

Vuosikerta74

Numero1

Aloitussivu24

Lopetussivu34

Sivujen määrä11

ISSN0278-2626

DOIhttps://doi.org/10.1016/j.bandc.2010.06.002


Tiivistelmä
Ambiguous (or bistable) figures are visual stimuli that have two mutually exclusive perceptual interpretations that spontaneously alternate with each other. Perceptual reversals, as compared with non-reversals, typically elicit a negative difference called reversal negativity (RN), peaking around 250 ms from stimulus onset. The cognitive interpretation of RN remains unclear: it may reflect either bottom-up processes, attentional processes that select between the alternative views of the stimulus, or it may reflect the change in the contents of subjective awareness. In the present study, event-related potentials in response to endogenous unilateral and bilateral reversals of two Necker lattices were compared with exogenously induced reversals of unambiguous lattices. The RN neither resembled the attention-related N2pc response, nor did it correlate with the content of subjective visual awareness. Thus, we conclude that RN is a non-attentional ERP correlate of the changes in the perceptual configuration of the presented object. (C) 2010 Elsevier Inc. All rights reserved.



Last updated on 2024-26-11 at 18:11