Manipulations of the relationship between response alternatives and exogenous saccade latencies

作者：Lawrence Bonnie M^*; Weaver Joseph S

来源：Experimental Brain Research, 2011, 214(2): 241-247.

DOI：10.1007/s00221-011-2824-7

• Exogenous
• Saccade
• Reaction time
• Hick's Law
• Response alternatives

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.

• 出版日期2011-10