Eglin M, Hunter A
Swiss Federal Institute of Technology, Zurich.
Mem Cognit. 1990 Sep;18(5):459-68. doi: 10.3758/bf03198479.
Stroop-like stimuli were presented to either the left or the right visual half-field. Subjects responded to the identity of the words above and below (the target dimension), which appeared above or below a reference point (the cuing dimension). Automatic Stroop-like effects were assessed as the difference in reaction times between congruent trials (e.g., above the reference point) and incongruent trials (e.g., above below the reference point) when both trial types were equally frequent. In blocks in which most trials were of one type (e.g., 80% congruent trials), controlled Stroop-like effects could be assessed. Automatic Stroop-like effects remained unchanged under different task manipulations. In contrast, controlled Stroop-like effects were reduced by lowering cue-response compatibility and by increasing the response alternatives from two to four. Thus, similar to other cuing effects, controlled Stroop-like effects are susceptible to manipulations that affect the response-decision stage and appear to involve response-selection processes. The resources supporting these response-selection decisions were not hemisphere-specific, and were sufficiently nonspecific that interference from a memory-load task was found. When resources were scarce, a consistent bias to attend to stimuli presented or responded to on the right was evident.
类似斯特鲁普效应的刺激呈现给左半视野或右半视野。受试者对出现在参考点上方或下方的单词的属性（目标维度）做出反应，参考点（提示维度）上方或下方会出现这些单词。当两种试验类型出现频率相同时，自动斯特鲁普样效应通过一致试验（如在参考点上方）和不一致试验（如在参考点下方）之间的反应时间差异来评估。在大多数试验为一种类型的组块中（如80%为一致试验），可以评估受控斯特鲁普样效应。在不同的任务操作下，自动斯特鲁普样效应保持不变。相比之下，通过降低提示-反应兼容性以及将反应选项从两个增加到四个，受控斯特鲁普样效应会降低。因此，与其他提示效应类似，受控斯特鲁普样效应易受影响反应决策阶段的操作影响，且似乎涉及反应选择过程。支持这些反应选择决策的资源并非半球特异性的，并且具有足够的非特异性，以至于发现了来自记忆负荷任务的干扰。当资源稀缺时，明显存在一种始终偏向于关注右侧呈现或对右侧做出反应的刺激的倾向。
