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dc.contributor.author
Kang, Yul H.R.
dc.contributor.author
Petzschner, Frederike H.
dc.contributor.author
Wolpert, Daniel M.
dc.contributor.author
Shadlen, Michael N.
dc.date.accessioned
2017-11-02T13:57:05Z
dc.date.available
2017-10-06T03:05:58Z
dc.date.available
2017-11-02T13:57:05Z
dc.date.issued
2017-08
dc.identifier.other
10.1016/j.cub.2017.06.047
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/191324
dc.identifier.doi
10.3929/ethz-b-000191324
dc.description.abstract
Many decisions arise through an accumulation of evidence to a terminating threshold. The process, termed bounded evidence accumulation (or drift diffusion), provides a unified account of decision speed and accuracy, and it is supported by neurophysiology in human and animal models. In many situations, a decision maker may not communicate a decision immediately and yet feel that at some point she had made up her mind. We hypothesized that this occurs when an accumulation of evidence reaches a termination threshold, registered, subjectively, as an “aha” moment. We asked human participants to make perceptual decisions about the net direction of dynamic random dot motion. The difficulty and viewing duration were controlled by the experimenter. After indicating their choice, participants adjusted the setting of a clock to the moment they felt they had reached a decision. The subjective decision times (tSDs) were faster on trials with stronger (easier) motion, and they were well fit by a bounded drift-diffusion model. The fits to the tSDs alone furnished parameters that fully predicted the choices (accuracy) of four of the five participants. The quality of the prediction provides compelling evidence that these subjective reports correspond to the terminating process of a decision rather than a post hoc inference or arbitrary report. Thus, conscious awareness of having reached a decision appears to arise when the brain’s representation of accumulated evidence reaches a threshold or bound. We propose that such a mechanism might play a more widespread role in the “piercing of consciousness” by non-conscious thought processes.
en_US
dc.language.iso
en
en_US
dc.publisher
Cell Press
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
consciousness
en_US
dc.subject
decision making
en_US
dc.subject
mental chronometry
en_US
dc.subject
motion perception
en_US
dc.subject
reaction time
en_US
dc.title
Piercing of Consciousness as a Threshold-Crossing Operation
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2017-07-27
ethz.journal.title
Current Biology
ethz.journal.volume
27
en_US
ethz.journal.issue
15
en_US
ethz.pages.start
2285
en_US
ethz.pages.end
2295
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Cambridge, MA
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02140 - Dep. Inf.technologie und Elektrotechnik / Dep. of Inform.Technol. Electrical Eng.::02631 - Institut für Biomedizinische Technik / Institute for Biomedical Engineering::03955 - Stephan, Klaas E. / Stephan, Klaas E.
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02140 - Dep. Inf.technologie und Elektrotechnik / Dep. of Inform.Technol. Electrical Eng.::02631 - Institut für Biomedizinische Technik / Institute for Biomedical Engineering::03955 - Stephan, Klaas E. / Stephan, Klaas E.
ethz.date.deposited
2017-10-06T03:06:05Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2018-02-01T09:22:39Z
ethz.rosetta.lastUpdated
2019-02-02T13:10:33Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.rosetta.versionExported
true
ethz.COinS
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