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Two attentional components for two purposes

Published online by Cambridge University Press:  01 December 1997

B. Fischer  and
H. Weber
B. Fischer
Affiliation:
Brain Research Unit, Institute of Biophysics, University of Freiburg, D-79104 Freiburg, Germanybfischer@ruf.uni-freiburg.de
H. Weber
Affiliation:
Brain Research Unit, Institute of Biophysics, University of Freiburg, D-79104 Freiburg, Germanybfischer@ruf.uni-freiburg.de
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Abstract

Inappropriate saccades are prevented by fixation and by voluntary attention. The fixation system inhibits the saccade system. Like monkeys without a fixation system, humans with a weak fixation system produce many express saccades and cannot suppress prosaccades in an antisaccade task. With permanent attention to a peripheral location only a few express saccades to a stimulus at this location can be elicited: the sustained component of attention acts like fixation. When attention is captured by a precue, more express saccades are obtained: the stimulus-driven component of attention facilitates saccade generation. If the cue correctly indicates the direction for an antisaccade error rate and latencies are increased.

Type
Authors' Response
Information
Behavioral and Brain Sciences , Volume 20 , Issue 4 , December 1997 , pp. 770 - 771
Copyright
© 1997 Cambridge University Press

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