Selective attentional delays and attentional capture among multiple visual onset elements

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.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Psychology

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Fournier, Lisa Renee

Contributors dc:contributor

• Eriksen, Charles W.

• Psychology, Behavioral
• Psychology, Experimental

Statement dc:rights

• Copyright 1993 Fournier, Lisa Renee

Language dc:language

eng

Identifier

AAI9329030
(UMI)AAI9329030

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/22543