We examined whether Redundancy Gain (RG) can be dissociated from the response stage of a go/nogo paradigm, and whether the meaningfulness of a stimulus modulates the stage at which interhemispheric transfer occurs. Experiment 1 used a lateralized match-to-category paradigm, taken from categories with varying meaningfulness. Experiment 2 presented a novel design, which separates the perceptual stage from response formation, in examination of RG. A sequence of two stimuli was presented. Participants responded by matching the category of the second stimulus to that of the first. The redundant stimulus could appear at the first or the second stage, thus redundancy gain could be separated from the response. Experiment 1 revealed that redundancy gain occurs earlier in the process of stimulus identification for highly meaningful stimuli than for less meaningful stimuli. The results of Experiment 2 support the hypothesis that redundancy gain results from interhemispheric integration of perceptual information, rather than response-formation. Results from both experiments suggest that redundancy gain arises from interhemispheric integration in the perceptual stage, and the efficiency of this integration depends on the meaningfulness of the stimulus. These results are relevant to current hypotheses about the physiological mechanisms underlying RG.

我们研究了冗余增益（RG）是否可以与 go/nogo 范式的响应阶段分离，以及刺激的意义是否调节半球间转移发生的阶段。实验 1 使用横向匹配类别范式，取自具有不同意义的类别。实验 2 提出了一种新颖的设计，在 RG 的检查中将感知阶段与反应形成分开。呈现了两个刺激的序列。参与者通过将第二个刺激的类别与第一个刺激的类别相匹配来做出反应。冗余刺激可能出现在第一阶段或第二阶段，因此冗余增益可以与响应分开。实验 1 表明，在刺激识别过程中，对于高度有意义的刺激，冗余增益发生得比对于不太有意义的刺激更早。实验2的结果支持这样的假设：冗余增益是由感知信息的半球整合而不是反应形成产生的。两个实验的结果表明，冗余增益是由感知阶段的半球间整合产生的，而这种整合的效率取决于刺激的意义。这些结果与当前有关 RG 生理机制的假设相关。