Recent studies have demonstrated a novel compatibility (or correspondence) effect between physical stimulus size and horizontally aligned responses: Left-hand responses are shorter and more accurate to a small stimulus, compared to a large stimulus, whereas the opposite is true for right-hand responses. The present study investigated whether relative or absolute size is responsible for the effect. If relative size was important, a particular stimulus would elicit faster left-hand responses if the other stimuli in the set were larger, but the same stimulus would elicit a faster right-hand response if the other stimuli in the set were smaller. In terms of two-visual-systems theory, our study explores whether “vision for perception” (i.e., the ventral system) or “vision for action” (i.e., the dorsal system) dominates the processing of stimulus size in our task. In two experiments, participants performed a discrimination task in which they responded to stimulus color (Experiment 1) or to stimulus shape (Experiment 2) with their left/right hand. Stimulus size varied as an irrelevant stimulus feature, thus leading to corresponding (small-left; large-right) and non-corresponding (small-right; large-left) conditions. Moreover, a set of smaller stimuli and a set of larger stimuli, with both sets sharing an intermediately sized stimulus, were used in different conditions. The consistently significant two-way interaction between stimulus size and response location demonstrated the presence of the correspondence effect. The three-way interaction between stimulus size, response location, and stimulus set, however, was never significant. The results suggest that participants are inadvertently classifying stimuli according to relative size in a context-specific manner.

最近的研究表明，物理刺激大小和水平对齐的反应之间存在一种新的相容（或对应）效应：与大刺激相比，左手反应对小刺激更短、更准确，而右手反应则相反。回应。本研究调查了相对或绝对大小是造成这种影响的原因。如果相对大小很重要，如果集合中的其他刺激较大，特定刺激会引发更快的左手反应，但如果组中的其他刺激更小，相同的刺激会引发更快的右手反应。在双视觉系统理论方面，我们的研究探讨了“视觉感知”（即腹侧系统）还是“视觉行动”（即，背系统）在我们的任务中支配着刺激大小的处理。在两个实验中，参与者执行了一项辨别任务，他们用左手/右手对刺激颜色（实验 1）或刺激形状（实验 2）做出反应。刺激大小作为不相关的刺激特征而变化，从而导致相应的（小左；大右）和不相应的（小右；大左）条件。此外，一组较小的刺激和一组较大的刺激，两组共享一个中等大小的刺激，用于不同的条件。刺激大小和响应位置之间持续显着的双向交互表明存在对应效应。然而，刺激大小、反应位置和刺激集之间的三向交互作用并不显着。