Müller Dana, Schwarz Wolf
Department of Psychology, University of Potsdam, 14415 Potsdam-Golm, Germany.
Psychol Res. 2007 Sep;71(5):598-613. doi: 10.1007/s00426-006-0070-6. Epub 2006 Jun 20.
In a parity-judgment task smaller numbers are responded to faster with the left-hand key and vice versa for larger numbers (SNARC effect; Dehaene et al., in Journal of Experimental Psychology: General, 122, 371-396, 1993). We used the psychological refractory period paradigm involving a parity-judgment task and tone-discrimination task to address the question at which stage this effect arises. When the parity-judgment task is performed second, then we found equal SNARC effects for the short and the long SOA. According to the central bottleneck model, this indicates that the effect arises during the response-selection or execution stage. In Experiment 2 the parity-judgment task was performed first. The pattern of results indicates that the SNARC effect originates during the perceptual encoding or response-selection. Together, our results suggest that the SNARC effect originates while the response is selected.
在奇偶判断任务中，较小数字用左手键反应更快，较大数字则相反（空间数字反应编码联合效应；德阿纳等人，《实验心理学杂志：总论》，第122卷，第371 - 396页，1993年）。我们使用了涉及奇偶判断任务和音调辨别任务的心理不应期范式，以解决该效应在哪个阶段出现的问题。当奇偶判断任务在第二个执行时，我们发现对于短和长的刺激间隔时间（SOA），空间数字反应编码联合效应是相同的。根据中枢瓶颈模型，这表明该效应出现在反应选择或执行阶段。在实验2中，奇偶判断任务首先执行。结果模式表明，空间数字反应编码联合效应起源于知觉编码或反应选择阶段。总之，我们的结果表明，空间数字反应编码联合效应在反应被选择时产生。
