Department of Psychology, New York University, New York, NY 10003, USA.
Exp Brain Res. 2011 Oct;214(2):241-7. doi: 10.1007/s00221-011-2824-7. Epub 2011 Aug 30.
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.
眼跳潜伏期与反应选择数量之间的关系很复杂。之前，我们发现随着反应选择数量的增加，外源性眼跳潜伏期会缩短（即反 Hick 效应）。在本研究中，我们考察了自下而上和自上而下的影响对该效应的作用。在实验 1 中，我们发现反 Hick 效应取决于反应选择的数量而不是配置，这表明该效应不是纯粹的自下而上的现象。在实验 2 中，我们考察了自上而下的过程（如预期）是否会影响反应选择和反应时间之间关系的大小和/或方向。我们发现，交错排列而不是连续排列选择数量会否定反 Hick 效应。总之，这些结果表明，反 Hick 效应不仅源于基于刺激的感知信号，还源于更高阶的控制信号。
