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Response dependence of reversal‐related ERP components in perception of ambiguous figures

Abdallah, Diane, Brooks, Joseph L. (2020) Response dependence of reversal‐related ERP components in perception of ambiguous figures. Psychophysiology, . ISSN 0048-5772. (doi:10.1111/psyp.13685) (KAR id:83592)

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Perceptual multi‐stability is characterized by alternating interpretations of an unchanging stimulus input. The reversal negativity (RN) and reversal positivity (RP) ERP components show differences in electrophysiological responses between trials on which participants experience a perceptual reversal of a multi‐stable stimulus versus trials without a reversal (i.e., stable). However, it is unclear to what extent these two ERP components reflect reversal‐related perceptual processing rather than task and response processes. To address this, we varied task and response requirements while measuring the RN and RP. In the standard reversal task, participants indicated whether they saw a perceptual reversal on each trial. In contrast, in the identity task participants reported perceived identity of the stimulus (e.g., face or vase) without any reference to reversals. In some blocks, reversal trials required a response whereas in other blocks stable trials required a response. We found that the RN appeared independently of task and response style. However, the early latency RP component was only present when participants responded manually. For non‐response trials, a component was found during the same latency as the RP but with inverted polarity. Our results suggest that the early RP component is dependent on response‐related processes rather than being a pure neural signature of perceptual processes related to endogenous perceptual reversals.

Item Type: Article
DOI/Identification number: 10.1111/psyp.13685
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Divisions: Divisions > Division of Human and Social Sciences > School of Psychology
Depositing User: Diane Abdallah
Date Deposited: 21 Oct 2020 10:50 UTC
Last Modified: 16 Feb 2021 14:15 UTC
Resource URI: (The current URI for this page, for reference purposes)
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