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Title:Selective attentional delays and attentional capture among multiple visual onset elements
Author(s):Fournier, Lisa Renee
Doctoral Committee Chair(s):Eriksen, Charles W.
Department / Program:Psychology
Discipline:Psychology
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
Subject(s):Psychology, Behavioral
Psychology, Experimental
Abstract:Discrimination and detection responses to a single stimulus presented simultaneously with noise stimuli are slower and less accurate compared to when a single stimulus is presented alone. This occurs even though the location of the relevant stimulus (target) is known or visually indicated with stimuli onset. Results showed noise elements delay both focal attending and automatic processing of a target. Furthermore, visually indicating the target location before target-noise onset (precuing) reduces and can eliminate target processing delays. Processing delays were not due to response competition, random attentional capture by noise, or difficulties in locating the target. It is suggested that simultaneous onset stimuli are perceived initially as a single object and delays in processing a single stimulus are due to difficulties in perceptually segregating this stimulus from noise. Precuing is assumed to facilitate this segregation process.
Issue Date:1993
Type:Text
Language:English
URI:http://hdl.handle.net/2142/22543
Rights Information:Copyright 1993 Fournier, Lisa Renee
Date Available in IDEALS:2011-05-07
Identifier in Online Catalog:AAI9329030
OCLC Identifier:(UMI)AAI9329030


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