Why do humans make antisaccade errors?
- Author(s)
- Hyung Lee; Mathias Abegg; Amadeo Rodriguez; John Koehn; Jason J. S. Barton
- Keimyung Author(s)
- Lee, Hyung
- Department
- Dept. of Neurology (신경과학)
- Journal Title
- Experimental Brain Research
- Issued Date
- 2010
- Volume
- 201
- Issue
- 1
- Abstract
- Antisaccade errors are attributed to failure to
inhibit the habitual prosaccade. We investigated whether
the amount of information about the required response the
patient has before the trial begins also contributes to error
rate. Participants performed antisaccades in five conditions.
The traditional design had two goals on the left and right
horizontal meridians. In the second condition, stimulusgoal
confusability between trials was eliminated by displacing
one goal upward. In the third, hemifield uncertainty
was eliminated by placing both goals in the same hemifield.
In the fourth, goal uncertainty was eliminated by
having only one goal, but interspersed with no-go trials.
The fifth condition eliminated all uncertainty by having the
same goal on every trial. Antisaccade error rate increased
by 2% with each additional source of uncertainty, with the
main effect being hemifield information, and a trend for
stimulus-goal confusability. A control experiment for the
effects of increasing angular separation between targets
without changing these types of prior response information
showed no effects on latency or error rate. We conclude
that other factors besides prosaccade inhibition contribute
to antisaccade error rates in traditional designs, possibly by
modulating the strength of goal activation.
Keywords Antisaccade Error Probability Decision
- 공개 및 라이선스
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