Probabilistic Computation in Human Perception under Variability in Encoding Precision
Identifieur interne : 002259 ( Main/Merge ); précédent : 002258; suivant : 002260Probabilistic Computation in Human Perception under Variability in Encoding Precision
Auteurs : Shaiyan Keshvari ; Ronald Van Den Berg ; Wei Ji MaSource :
- PLoS ONE [ 1932-6203 ] ; 2012.
Abstract
A key function of the brain is to interpret noisy sensory information. To do so optimally, observers must, in many tasks, take into account knowledge of the precision with which stimuli are encoded. In an orientation change detection task, we find that encoding precision does not only depend on an experimentally controlled reliability parameter (shape), but also exhibits additional variability. In spite of variability in precision, human subjects seem to take into account precision near-optimally on a trial-to-trial and item-to-item basis. Our results offer a new conceptualization of the encoding of sensory information and highlight the brain’s remarkable ability to incorporate knowledge of uncertainty during complex perceptual decision-making.
Url:
DOI: 10.1371/journal.pone.0040216
PubMed: 22768258
PubMed Central: 3387023
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Probabilistic Computation in Human Perception under Variability in Encoding Precision</title><author><name sortKey="Keshvari, Shaiyan" sort="Keshvari, Shaiyan" uniqKey="Keshvari S" first="Shaiyan" last="Keshvari">Shaiyan Keshvari</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author><author><name sortKey="Van Den Berg, Ronald" sort="Van Den Berg, Ronald" uniqKey="Van Den Berg R" first="Ronald" last="Van Den Berg">Ronald Van Den Berg</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author><author><name sortKey="Ma, Wei Ji" sort="Ma, Wei Ji" uniqKey="Ma W" first="Wei Ji" last="Ma">Wei Ji Ma</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">22768258</idno><idno type="pmc">3387023</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3387023</idno><idno type="RBID">PMC:3387023</idno><idno type="doi">10.1371/journal.pone.0040216</idno><date when="2012">2012</date><idno type="wicri:Area/Pmc/Corpus">002209</idno><idno type="wicri:Area/Pmc/Curation">002209</idno><idno type="wicri:Area/Pmc/Checkpoint">001606</idno><idno type="wicri:Area/Ncbi/Merge">002117</idno><idno type="wicri:Area/Ncbi/Curation">002117</idno><idno type="wicri:Area/Ncbi/Checkpoint">002117</idno><idno type="wicri:Area/Main/Merge">002259</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Probabilistic Computation in Human Perception under Variability in Encoding Precision</title><author><name sortKey="Keshvari, Shaiyan" sort="Keshvari, Shaiyan" uniqKey="Keshvari S" first="Shaiyan" last="Keshvari">Shaiyan Keshvari</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author><author><name sortKey="Van Den Berg, Ronald" sort="Van Den Berg, Ronald" uniqKey="Van Den Berg R" first="Ronald" last="Van Den Berg">Ronald Van Den Berg</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author><author><name sortKey="Ma, Wei Ji" sort="Ma, Wei Ji" uniqKey="Ma W" first="Wei Ji" last="Ma">Wei Ji Ma</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author></analytic><series><title level="j">PLoS ONE</title><idno type="eISSN">1932-6203</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>A key function of the brain is to interpret noisy sensory information. To do so optimally, observers must, in many tasks, take into account knowledge of the precision with which stimuli are encoded. In an orientation change detection task, we find that encoding precision does not only depend on an experimentally controlled reliability parameter (shape), but also exhibits additional variability. In spite of variability in precision, human subjects seem to take into account precision near-optimally on a trial-to-trial and item-to-item basis. Our results offer a new conceptualization of the encoding of sensory information and highlight the brain’s remarkable ability to incorporate knowledge of uncertainty during complex perceptual decision-making.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Tolhurst, D" uniqKey="Tolhurst D">D Tolhurst</name></author><author><name sortKey="Movshon, J" uniqKey="Movshon J">J Movshon</name></author><author><name sortKey="Dean, A" uniqKey="Dean A">A Dean</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Faisal, A" uniqKey="Faisal A">A Faisal</name></author><author><name sortKey="Selen, Lpj" uniqKey="Selen L">LPJ Selen</name></author><author><name sortKey="Wolpert, Dm" uniqKey="Wolpert D">DM Wolpert</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Gershon, Ed" uniqKey="Gershon E">ED Gershon</name></author><author><name sortKey="Wiener, Mc" uniqKey="Wiener M">MC 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