Are spatial frequencies integrated from coarse to fine?

Full Abstract

The existence of a temporal anisotropy in the integration of spatial frequencies, such that spatial frequencies are integrated more effectively if they are available from low to high through time, has been examined in a series of experiments. In the first experiment, the first three harmonics of a square wave were presented in a low-to-high or a high-to-low sequence in a temporal two-interval forced-choice experiment. Subjects were asked to indicate which sequence appeared to resemble a square wave more. A high-to-low sequence of spatial frequencies was judged to more resemble the target than the low-to-high sequence. These results support a temporal anisotropy in the integration of spatial frequencies of exactly the opposite form to that suggested from previous results. Further experiments established that this was not due to task differences or to subjects basing their decision on the final spatial frequency shown. An interpretation is offered in which an isotropic mechanism for spatial-frequency integration is combined with a recency bias.

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Author information

Author/s: McSorley, Eugene (E); Findlay, John M (JM);

Affiliation: Department of Psychology, University of London, Egham, UK.

Journal and publication information

Publication Type: Journal Article; Research Support, Non-U.S. Gov't

Journal: Perception (Perception), published in England. (Language: eng)

Reference: 2002-; vol 31 (issue 8) : pp 955-67

Dates: Created 2002/09/24; Completed 2002/10/29; Revised 2006/11/15;

PMID: 12269589, status: MEDLINE (last retrieval date: 11/6/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adult
Anisotropy
Female
Form Perception - physiology

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