The Capacity of Cognitive Control Estimated from a Perceptual Decision Making Task.

Abstract:

:Cognitive control refers to the processes that permit selection and prioritization of information processing in different cognitive domains to reach the capacity-limited conscious mind. Although previous studies have suggested that the capacity of cognitive control itself is limited, a direct quantification of this capacity has not been attempted. In this behavioral study, we manipulated the information rate of cognitive control by parametrically varying both the uncertainty of stimul measured as information entropy and the exposure time of the stimuli. We used the relationship between the participants' response accuracy and the information rate of cognitive control (in bits per second, bps) in the model fitting to estimate the capacity of cognitive control. We found that the capacity of cognitive control was approximately 3 to 4 bps, demonstrating that cognitive control as a higher-level function has a remarkably low capacity. This quantification of the capacity of cognitive control may have significant theoretical and clinical implications.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Wu T,Dufford AJ,Mackie MA,Egan LJ,Fan J

doi

10.1038/srep34025

subject

Has Abstract

pub_date

2016-09-23 00:00:00

pages

34025

issn

2045-2322

pii

srep34025

journal_volume

6

pub_type

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