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Adamian, N and Andersen, SK (2024) Attentional Modulation in Early Visual Cortex: A Focused Reanalysis of Steady-state Visual Evoked Potential Studies. Journal of Cognitive Neuroscience, 36 (1). pp. 46-70. ISSN 0898-929X
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Attentional Modulation in Early Visual Cortex A Focused Reanalysis of Steady-state Visual Evoked Potential Studies.pdf - Accepted Version Download (1MB) | Preview |
Abstract
Steady-state visual evoked potentials (SSVEPs) are a powerful tool for investigating selective attention. Here, we con-ducted a combined reanalysis of multiple studies employing this technique in a variety of attentional experiments to, first, establish benchmark effect sizes of attention on amplitude and phase of SSVEPs and, second, harness the power of a large data set to test more specific hypotheses. Data of eight pub-lished SSVEP studies were combined, in which human participants (n = 135 in total) attended to flickering random dot stimuli based on their defining features (e.g., location, color, luminance, or orientation) or feature conjunctions. The reanal-ysis established that, in all the studies, attention reliably enhanced amplitudes, with color-based attention providing the strongest effect. In addition, the latency of SSVEPs elicited by attended stimuli was reduced by ∼4 msec. Next, we investigated the modulation of SSVEP amplitudes in a subset of studies where two different features were attended concurrently. Although most models assume that attentional effects of multiple features are combined additively, our results suggest that neuronal enhancement provided by concurrent attention is better described by multiplicative integration. Finally, we used the combined data set to demonstrate that the increase in trial-averaged SSVEP amplitudes with attention cannot be explained by increased synchronization of single-trial phases. Contrary to the prediction of the phase-locking account, the variance across trials of complex Fourier coefficients increases with attention, which is more consistent with boosting of a largely phase-locked signal embedded in non-phase-locked noise.
| Item Type: | Article |
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| Uncontrolled Keywords: | Visual Cortex; Humans; Electroencephalography; Photic Stimulation; Attention; Evoked Potentials, Visual; Humans; Evoked Potentials, Visual; Electroencephalography; Attention; Visual Cortex; Photic Stimulation; 1109 Neurosciences; 1701 Psychology; 1702 Cognitive Sciences; Experimental Psychology |
| Subjects: | B Philosophy. Psychology. Religion > BF Psychology |
| Divisions: | Psychology (from Sep 2019) |
| Publisher: | MIT Press |
| SWORD Depositor: | A Symplectic |
| Date Deposited: | 29 Jul 2024 15:51 |
| Last Modified: | 30 Jul 2024 08:53 |
| DOI or ID number: | 10.1162/jocn_a_02070 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/23813 |
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