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Oculomotor capture by abrupt onsets reveals concurrent programming of voluntary and involuntary saccades

Published online by Cambridge University Press:  01 August 1999

Arthur F. Kramer ,
David E. Irwin ,
Jan Theeuwes  and
Sowon Hahn
Arthur F. Kramer
Affiliation:
Beckman Institute and Department of Psychology, University of Illinois, Champaign, IL 61820 {akramer; dirwin; shahn}@s.psych.uiuc.edu www.beckman.uiuc.edu/faculty/kramer.html
David E. Irwin
Affiliation:
Beckman Institute and Department of Psychology, University of Illinois, Champaign, IL 61820 {akramer; dirwin; shahn}@s.psych.uiuc.edu www.beckman.uiuc.edu/faculty/kramer.html
Jan Theeuwes
Affiliation:
Department of Psychology, Free University, 1081 HV Amsterdam, The [email protected]
Sowon Hahn
Affiliation:
Beckman Institute and Department of Psychology, University of Illinois, Champaign, IL 61820 {akramer; dirwin; shahn}@s.psych.uiuc.edu www.beckman.uiuc.edu/faculty/kramer.html
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Abstract

In several recent experiments we have found that the eyes are often captured by the appearance of a sudden onset in a display, even though subjects intend to move their eyes elsewhere. Very brief fixations are made on the abrupt onset before the eyes complete their intended movement to the previously defined target. These results indicate concurrent programming of a voluntary saccade to the defined saccade target and an involuntary saccade to the sudden onset. This is inconsistent with the idea that a single salience map determines the location of a saccade in a winner-take-all fashion. Other results indicate that subjects attend to more than one location in a display during saccade preparation, contrary to the claim that covert attentional scanning plays no role in saccade generation.

Type
Open Peer Commentary
Information
Behavioral and Brain Sciences , Volume 22 , Issue 4 , August 1999 , pp. 689 - 690
Copyright
© 1999 Cambridge University Press

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