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| Research article summary (published 30 Dec 2001): |
Multiple-object permanence tracking: limitation in maintenance and transformation of perceptual objects.
Full Abstract
Research on change blindness and transsaccadic memory revealed that a limited amount of information is retained across visual disruptions in visual working memory. It has been proposed that visual working memory can hold four to five coherent object representations. To investigate their maintenance and transformation in dynamic situations, I devised an experimental paradigm called multiple-object permanence tracking (MOPT) that measures memory for multiple feature-location bindings in dynamic situations. Observers were asked to detect any color switch in the middle of a regular rotation of a pattern with multiple colored disks behind an occluder. The color-switch detection performance dramatically declined as the pattern rotation velocity increased, and this effect of object motion was independent of the number of targets. The MOPT task with various shapes and colors showed that color-shape conjunctions are not available in the MOPT task. These results suggest that even completely predictable motion severely reduces our capacity of object representations, from four to only one or two.
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Author information
Author/s: Saiki, Jun (J);
Affiliation: Graduate School of Informatics, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto, 606-8501 Japan. saiki(-atsign-)i.kyoto-u.ac.jp
Journal and publication information
Publication Type: Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't
Journal: Progress in brain research (Prog Brain Res), published in Netherlands. (Language: eng)
Reference: 2002-; vol 140 (issue ) : pp 133-48
Dates: Created 2003/01/01; Completed 2003/01/27; Revised 2006/11/15;
PMID: 12508587, 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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