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 Repjournal_title
Scientific reportsauthors
Wu T,Dufford AJ,Mackie MA,Egan LJ,Fan Jdoi
10.1038/srep34025subject
Has Abstractpub_date
2016-09-23 00:00:00pages
34025issn
2045-2322pii
srep34025journal_volume
6pub_type
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