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| Research article summary (published 30 Jan 2002): |
Stimulus motion and retrospective time judgments.
Full Abstract
The effect of stimulus motion on retrospective time judgments was investigated in four experiments. Subjects reproduced the duration of a 32-s interval which was filled by either a stationary or moving visual element presented on a computer monitor. In Experiments 1 and 4, the element moved horizontally back and forth, and in Experiments 2 and 3 it traced a circular pathway. In Experiments 1 and 2, the element moved at speeds of either 5 or 20 cm/s. In Experiment 3, it moved at a constant speed, alternating direction between clockwise and anti-clockwise rotation once every 1, 4, 8 or 16 s. In Experiment 4 the element moved at linear speeds of 1, 2, 4, 8 or 16 cm/s back and forth along a 16 cm horizontal path thereby alternating between left- and rightward motion-directions once every 16, 8, 4, 2 and 1 s, respectively. Temporal reproductions were not systematically influenced by stimulus speed. Rather, the pattern of results indicated a nonmonotonic relationship between remembered duration and the frequency of motion-direction changes; whereas remembered duration was unaffected by either infrequent or very frequent rates of changes, moderate rates of motion-changes lengthens remembered duration. These findings are discussed in relation to the change models of retrospective timing, and the claim that stimulus speed, as distinct from changes in the direction of stimulus motion, is not an important determinant of retrospective timing.
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Author information
Author/s: Predebon, John (J);
Affiliation: Department of Psychology, University of Sydney, NSW, Australia. johnp@psych.usyd.edu.au
Journal and publication information
Publication Type: Journal Article
Journal: Acta psychologica (Acta Psychol (Amst)), published in Netherlands. (Language: eng)
Reference: 2002-Feb; vol 109 (issue 2) : pp 213-25
Dates: Created 2002/01/31; Completed 2002/02/20; Revised 2004/11/17;
PMID: 11820428, 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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