Probability Shapes Perceptual Precision: A Study in Orientation Estimation.
Probability is known to affect perceptual estimations, but an understanding of mechanisms is lacking. Moving beyond binary classification tasks, we had naive participants report the orientation of briefly viewed gratings where we systematically manipulated contingent probability. Participants rapidl...
| Publicado en: | Journal of Experimental Psychology. Human Perception & Performance Vol. 41; no. 6; pp. 1666 - 1680 |
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| Autores principales: | , |
| Formato: | Artículo |
| Publicado: |
American Psychological Association
Dec2015
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=111213707&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 111213707 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 00961523 EPH jtl: Journal of Experimental Psychology. Human Perception & Performance issn: 00961523 maglogo: N pubinfo: dt: Dec2015 vid: 41 iid: 6 pid: 34 pub: American Psychological Association artinfo: ui: 111213707 10.1037/xhp0000121 ppf: 1666 ppct: 14 formats: tig: atl: Probability Shapes Perceptual Precision: A Study in Orientation Estimation. aug: au: Jabar, Syaheed B. Anderson, Britt affil: University of Waterloo su: Attention Stimulus & response (Psychology) Spatial orientation Kurtosis Sampling errors sug: subj: Attention Stimulus & response (Psychology) Spatial orientation Kurtosis Sampling errors keyword: attention kurtosis orientation estimation probability visual perception attention kurtosis orientation estimation probability visual perception ab: Probability is known to affect perceptual estimations, but an understanding of mechanisms is lacking. Moving beyond binary classification tasks, we had naive participants report the orientation of briefly viewed gratings where we systematically manipulated contingent probability. Participants rapidly developed faster and more precise estimations for high-probability tilts. The shapes of their error distributions, as indexed by a kurtosis measure, also showed a distortion from Gaussian. This kurtosis metric was robust, capturing probability effects that were graded, contextual, and varying as a function of stimulus orientation. Our data can be understood as a probability-induced reduction in the variability or "shape" of estimation errors, as would be expected if probability affects the perceptual representations. As probability manipulations are an implicit component of many endogenous cuing paradigms, changes at the perceptual level could account for changes in performance that might have traditionally been ascribed to "attention". pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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