Rapid switching and complementary evidence accumulation enable flexibility of an all-or-none global workspace for control of attentional and conscious processing: a reply to Wyble
            <i>et al</i>
            .

Raffone, Antonino; Srinivasan, Narayanan; Leeuwen, Cees van

doi:10.1098/rstb.2014.0315

Cited by 4 publications

(2 citation statements)

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“…The information about stimulus orientation gathered over several trials while the system dwells in the mode of visual discrimination may have to be loaded into visual working memory (Rideaux, Apthorp, & Edwards, 2015). If perceptual learning engages working memory in this fashion, then, according to a recent working memory model (Raffone, Srinivasan, & van Leeuwen, 2014;Simione et al, 2012), this process competes for central capacity with the uptake of incoming stimulus information (Meghanathan, van Leeuwen, & Nikolaev, 2015;Raffone, Srinivasan, & van Leeuwen, 2015). When memory loading absorbs the central capacity, this may result in reduced visual discrimination and hence in a weakening of grouping by proximity.…”

Section: Intermittent Brain Dynamics May Underlie the Observed Regimementioning

confidence: 99%

Intermittent regime of brain activity at the early, bias-guided stage of perceptual learning

2016

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Perceptual learning improves visual performance. Among the plausible mechanisms of learning, reduction of perceptual bias has been studied the least. Perceptual bias may compensate for lack of stimulus information, but excessive reliance on bias diminishes visual discriminability. We investigated the time course of bias in a perceptual grouping task and studied the associated cortical dynamics in spontaneous and evoked EEG. Participants reported the perceived orientation of dot groupings in ambiguous dot lattices. Performance improved over a 1-hr period as indicated by the proportion of trials in which participants preferred dot groupings favored by dot proximity. The proximity-based responses were compromised by perceptual bias: Vertical groupings were sometimes preferred to horizontal ones, independent of dot proximity. In the evoked EEG activity, greater amplitude of the N1 component for horizontal than vertical responses indicated that the bias was most prominent in conditions of reduced visual discriminability. The prominence of bias decreased in the course of the experiment. Although the bias was still prominent, prestimulus activity was characterized by an intermittent regime of alternating modes of low and high alpha power. Responses were more biased in the former mode, indicating that perceptual bias was deployed actively to compensate for stimulus uncertainty. Thus, early stages of perceptual learning were characterized by episodes of greater reliance on prior visual preferences, alternating with episodes of receptivity to stimulus information. In the course of learning, the former episodes disappeared, and biases reappeared only infrequently.

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Section: Intermittent Brain Dynamics May Underlie the Observed Regimementioning

confidence: 99%

Intermittent regime of brain activity at the early, bias-guided stage of perceptual learning

2016

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“…The neurocognitive models vary, with the AB for instance proposed to result from central capacity limitations for processing the targets (e.g., Chun and Potter, 1995;Isaak et al, 1999;Raffone et al, 2015;Vogel et al, 1998), from inhibition aimed at preventing in--depth processing of non--targets (Olivers and Meeter, 2008) or from overeager attentional control mechanisms that hamper the detection of a target as long as another target is being processed (Taatgen et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Sex hormones modulate neurophysiological correlates of visual temporal attention

2016

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Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractThe functional cerebral asymmetry ( Estradiol levels were determined from saliva samples. In contrast to previous findings, FCA in RSVP target identification was not affected by cycle phase.However, the impairment in second--target identification when targets where closely spaced was generally smaller during the menstrual phase than during the follicular phase. This effect was matched by shorter peak latencies of P1 VEPs for the menstrual phase, and by a reduction in the latency of the second--target P3ERP for closely spaced relative to widely spaced target pairs, again for the menstrual phase. Results suggest that in a dual--stream RSVP setup, target identification, early stage stimulus processing, and target consolidation are affected by cycle phase, but that the asymmetry of these effects does not differ 3 between menstrual and follicular phase. The observed cycle--related modulations in neurophysiology and behavior could relate to the effects of estradiol on the locus ceruleus norepinephrine (LC--NE) system, which is known to play a major role in arousal, attention and stress response.

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Bridging flexible goal-directed cognition and consciousness: The Goal-Aligning Representation Internal Manipulation theory

Granato,

Baldassarre

2024

Neural Networks

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Rapid switching and complementary evidence accumulation enable flexibility of an all-or-none global workspace for control of attentional and conscious processing: a reply to Wyble et al .

Cited by 4 publications

References 21 publications

Intermittent regime of brain activity at the early, bias-guided stage of perceptual learning

Intermittent regime of brain activity at the early, bias-guided stage of perceptual learning

Sex hormones modulate neurophysiological correlates of visual temporal attention

Bridging flexible goal-directed cognition and consciousness: The Goal-Aligning Representation Internal Manipulation theory

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