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PLoS One. 2012;7(11):e49454. doi: 10.1371/journal.pone.0049454. Epub 2012 Nov 14.

Probability of seeing increases saccadic readiness.

Author information

1
Laboratoire Psychologie de la Perception, Université Paris Descartes & CNRS, Paris, France. collins.th@gmail.com

Abstract

Associating movement directions or endpoints with monetary rewards or costs influences movement parameters in humans, and associating movement directions or endpoints with food reward influences movement parameters in non-human primates. Rewarded movements are facilitated relative to non-rewarded movements. The present study examined to what extent successful foveation facilitated saccadic eye movement behavior, with the hypothesis that foveation may constitute an informational reward. Human adults performed saccades to peripheral targets that either remained visible after saccade completion or were extinguished, preventing visual feedback. Saccades to targets that were systematically extinguished were slower and easier to inhibit than saccades to targets that afforded successful foveation, and this effect was modulated by the probability of successful foveation. These results suggest that successful foveation facilitates behavior, and that obtaining the expected sensory consequences of a saccadic eye movement may serve as a reward for the oculomotor system.

PMID:
23166674
PMCID:
PMC3498136
DOI:
10.1371/journal.pone.0049454
[Indexed for MEDLINE]
Free PMC Article

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