The Structure of Integral Dimensions: Contrasting Topological and Cartesian Representations.
Diverse evidence shows that perceptually integral dimensions, such as those composing color, are represented holistically. However, the nature of these holistic representations is poorly understood. Extant theories, such as those founded on multidimensional scaling or general recognition theory, mod...
| Published in: | Journal of Experimental Psychology. Human Perception & Performance Vol. 39; no. 1; pp. 111 - 133 |
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| Main Authors: | , |
| Format: | Article |
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American Psychological Association
Feb2013
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| Subjects: | |
| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=85225502&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 85225502 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: Feb2013 vid: 39 iid: 1 pid: 34 pub: American Psychological Association artinfo: ui: 85225502 10.1037/a0029059 ppf: 111 ppct: 22 formats: tig: atl: The Structure of Integral Dimensions: Contrasting Topological and Cartesian Representations. aug: au: Jones, Matt Goldstone, Robert L. affil: University of Colorado Indiana University su: Learning Psychology Cartesianism (Philosophy) Topological spaces Task analysis sug: subj: Learning Psychology Cartesianism (Philosophy) Topological spaces Task analysis keyword: Cartesian representation integral dimensions perceptual representation topological representation unsupervised learning Cartesian representation integral dimensions perceptual representation topological representation unsupervised learning ab: Diverse evidence shows that perceptually integral dimensions, such as those composing color, are represented holistically. However, the nature of these holistic representations is poorly understood. Extant theories, such as those founded on multidimensional scaling or general recognition theory, model integral stimulus spaces using a Cartesian coordinate system, just as with spaces defined by separable dimensions. This approach entails a rich geometrical structure that has never been questioned but may not be psychologically meaningful for integral dimensions. In particular, Cartesian models carry a notion of orthogonality of component dimensions, such that if 1 dimension is diagnostic for a classification or discrimination task, another can be selected as uniquely irrelevant. This article advances an alternative model in which integral dimensions are characterized as topological spaces. The Cartesian and topological models are tested in a series of experiments using the perceptual-learning phenomenon of dimension differentiation, whereby discrimination training with integral-dimension stimuli can induce an analytic representation of those stimuli. Under the present task design, the 2 models make contrasting predictions regarding the analytic representation that will be learned. Results consistently support the Cartesian model. These findings indicate that perceptual representations of integral dimensions are surprisingly structured, despite their holistic, unanalyzed nature. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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