Influences of target and nontarget shapes on target identification |
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Authors: | Garvin Chastain MaryLou Cheal |
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Institution: | (1) Boise State University, Boise, ID 83125; e-mail: gchasta@boisestate.edu,;(2) Arizona State University, 127 E. Loma Vista Drive, Tempe, AZ 85282-3574; Tel.: 602-967-5848; e-mail: cheal@asu.edu, |
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Abstract: | The orientation of a nontarget in a location-cuing paradigm has been shown to affect accuracy of identification of target
orientation when modified plus-signs (Ts) are the stimuli. In the current study, similar effects were found with Landolt C
(C) stimuli. Both shapes of targets were identified by orientation. Moreover, targets were affected by nontargets whether
both target and nontarget were the same shape or if they were different shapes. A single nontarget with an orientation that
matched that of the target improved accuracy of identification of target orientation, whereas a nontarget with an orientation
that did not match that of the target impaired accuracy of identification of target orientation, even though the nontargets
appeared in locations that were never cued and could never contain targets. The data are consistent with either the Variable
and Permeable Filters metaphor or a response competition account.
Received: 1 July 1998 / Accepted: 22 October 1998 |
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Keywords: | |
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