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Response Dependence of Reversal Related ERP Components in Perception of Ambiguous Figures

Abdallah, Diane; Brooks, Joseph

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Authors

Diane Abdallah



Abstract

Perceptual multi-stability is characterised 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.

Journal Article Type Article
Acceptance Date Aug 19, 2020
Online Publication Date Sep 17, 2020
Publication Date 2020-12
Publicly Available Date Mar 29, 2024
Journal Psychophysiology
Print ISSN 0048-5772
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 57
Issue 12
Article Number e13685
DOI https://doi.org/10.1111/psyp.13685
Keywords EEG ERPs perceptual multistability reversible figures sensation/perception visual perception
Publisher URL https://onlinelibrary.wiley.com/doi/10.1111/psyp.13685

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