Does Presentation Duration Modulate the Effect of Task on Perceptual Organization?

Buckley, Ned ORCID: 0009-0006-5252-3841 and Makin, Alexis DJ ORCID: 0000-0002-4490-7400 (2024) Does Presentation Duration Modulate the Effect of Task on Perceptual Organization? SYMMETRY-BASEL, 16 (11). p. 1486. ISSN 2073-8994, 2073-8994

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Abstract

Visual symmetry activates the extrastriate cortex. This symmetry activation generates an Event Related Potential (ERP) named the Sustained Posterior Negativity (SPN). The SPN is larger when participants engage in regularity discrimination tasks than luminance discrimination tasks. Two recent studies suggest that the type of task matters more when the stimulus is presented briefly. We tested this claim with a new sample of 52 participants in a within-subjects design. As predicted, the SPNs were larger in Regularity tasks than Luminance tasks. However, contrary to predictions, the effect of the task was very similar in long and short presentation duration blocks. It remains unclear what factors modulate the task effect. However, presentation duration is not as important as previous results suggest.

Item Type:	Article
Uncontrolled Keywords:	symmetry, sustained posterior negativity, EEG, ERP, duration
Divisions:	Faculty of Health & Life Sciences Faculty of Health & Life Sciences > Inst. Population Health
Depositing User:	Symplectic Admin
Date Deposited:	08 Nov 2024 16:58
Last Modified:	23 May 2026 09:28
DOI:	10.3390/sym16111486
Open Access URL:	https://doi.org/10.3390/sym16111486
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3187228
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