Hübner Ronald, Lehle Carola
Kognitive Psychologie, Fachbereich Psychologie, Universitat Konstanz, Konstanz, Germany.
J Exp Psychol Hum Percept Perform. 2007 Feb;33(1):103-23. doi: 10.1037/0096-1523.33.1.103.
In this study, the authors used a dual-task flanker paradigm to investigate the degree to which flankers are coprocessed with the target as a function of whether flankers have to be used as stimuli for a second task. A series of experiments, in which performance in dual tasks was compared with that in single tasks, revealed that participants had a strong tendency to coprocess flankers to a large degree in dual tasks, even if this impaired performance. Coprocessing of flankers was reduced only when totally irrelevant flankers were presented at the beginning of a trial or single tasks were performed on the great majority of trials within a block. The results suggest that it was demanding to process targets and flankers serially when both had to be used for a dual task. As a consequence, target and flankers were processed in parallel, even if this was nonoptimal for target selection.
在本研究中，作者使用双任务侧翼范式来研究侧翼刺激与目标刺激同时被处理的程度，该程度是侧翼刺激是否必须被用作第二项任务的刺激的函数。一系列将双任务表现与单任务表现进行比较的实验表明，参与者在双任务中有很强的倾向，即使这会损害表现，他们也会在很大程度上同时处理侧翼刺激。只有当在试验开始时呈现完全不相关的侧翼刺激，或者在一个组块中的绝大多数试验中执行单任务时，侧翼刺激的同时处理才会减少。结果表明，当目标和侧翼刺激都必须用于双任务时，依次处理它们是很困难的。因此，目标和侧翼刺激是并行处理的，即使这对目标选择并非最优。
