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| Research article summary (published 30 Dec 2001): |
Global interference: the effect of exposure duration that is substituted for spatial frequency.
Full Abstract
In this study, participants were required to identify hierarchically structured patterns that appeared at either global or local level. Paquet and Merikle (1984 Canadian Journal of Psychology 381 45-53) showed that global interference is affected by exposure duration in the processing of a hierarchical structure. They showed that only global-to-local interference occurred at short exposure durations. In contrast, global-to-local as well as local-to-global interference was observed at long exposure durations. They suggested that the effect of exposure duration with global interference depends on the high-spatial-frequency versus low-spatial-frequency channel. In the present study, exposure duration (short or long) was varied randomly from trial to trial (experiment 1), or held constant (experiment 2). In experiment 1, global-to-local interference occurred at both short and long exposure durations, even though the same physical properties existed as in experiment 2. In experiment 2, both global-to-local and local-to-global interference occurred at only long exposure durations, in line with the results reported by Paquet and Merikle. This suggests that the effect of exposure duration on global interference is explained not only by spatial-frequency channels, but also by attentional shift.
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Author information
Author/s: Hibi, Yuko (Y); Takeda, Yuji (Y); Yagi, Akihiro (A);
Affiliation: Department of Psychology, Kwansei Gakuin University, Hyogo, Japan. hibi@L.u-tokyo.ac.jp
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 3) : pp 341-8
Dates: Created 2002/04/16; Completed 2002/04/25; Revised 2006/11/15;
PMID: 11954695, 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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