Manipulations of the relationship between response alternatives and exogenous saccade latencies

Exp Brain Res. 2011 Oct;214(2):241-7. doi: 10.1007/s00221-011-2824-7. Epub 2011 Aug 30.

Abstract

The relationship between the latencies of saccadic eye movements and the number of response alternatives is complex. Previously, we have found a decrease in exogenous saccade latencies with an increase in the number of response alternatives (i.e., an anti-Hick's effect). In the present study, we examined the effect of bottom up and top down influences on the effect. In Experiment 1, we found that the anti-Hick's effect is dependent upon the number, as opposed to the configuration, of response alternatives, suggesting that the effect is not a purely bottom up phenomenon. In Experiment 2, we examined whether top down processes, such as expectancy, influence the magnitude and/or direction of the relationship between response alternatives and reaction time. We found that interleaving, as opposed to blocking, the number of alternatives negated the anti-Hick's effect. Taken together, these results suggest that the anti-Hick's effect arises not only from stimulus-based perceptual signals but also from higher-order control signals.

Publication types

  • Comparative Study

MeSH terms

  • Humans
  • Photic Stimulation / methods*
  • Psychomotor Performance / physiology*
  • Reaction Time / physiology*
  • Saccades / physiology*
  • Time Factors
  • Young Adult