Conscious face perception dissociated from visual attention_R1.pdf (3.43 MB)
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Dissociation between the neural correlates of conscious face perception and visual attention.

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journal contribution
posted on 26.06.2019, 10:13 by Joaquin Navajas, Aleksander W. Nitka, Rodrigo Quian Quiroga
Given the higher chance to recognize attended compared to unattended stimuli, the specific neural correlates of these two processes, attention and awareness, tend to be intermingled in experimental designs. In this study, we dissociated the neural correlates of conscious face perception from the effects of visual attention. To do this, we presented faces at the threshold of awareness and manipulated attention through the use of exogenous prestimulus cues. We show that the N170 component, a scalp EEG marker of face perception, was modulated independently by attention and by awareness. An earlier P1 component was not modulated by either of the two effects and a later P3 component was indicative of awareness but not of attention. These claims are supported by converging evidence from (a) modulations observed in the average evoked potentials, (b) correlations between neural and behavioral data at the single-subject level, and (c) single-trial analyses. Overall, our results show a clear dissociation between the neural substrates of attention and awareness. Based on these results, we argue that conscious face perception is triggered by a boost in face-selective cortical ensembles that can be modulated by, but are still independent from, visual attention.

Funding

J. N. is supported by the European Research Council StG (NEUROCODEC, #309865).

History

Citation

Psychophysiology, 2017, 54 (8), pp. 1138-1150

Author affiliation

/Organisation/COLLEGE OF LIFE SCIENCES/Biological Sciences/Neuroscience, Psychology and Behaviour

Version

AM (Accepted Manuscript)

Published in

Psychophysiology

Publisher

Wiley for Society for Psychophysiological Research

eissn

1540-5958

Acceptance date

10/03/2017

Copyright date

2017

Available date

26/06/2019

Publisher version

https://onlinelibrary.wiley.com/doi/full/10.1111/psyp.12873

Language

en