Brand-D'Abrescia Muriele, Lavie Nilli
University College London, London, England.
Percept Psychophys. 2008 Apr;70(3):508-15. doi: 10.3758/pp.70.3.508.
Load theory predictions for the effects of task coordination between and within sensory modalities (vision and hearing or vision only) on the level of distraction were tested. Response competition effects in a visual flanker task when it was coordinated with an auditory discrimination task (between-modality conditions) or a visual discrimination task (within-modality conditions) were compared with single-task conditions. In the between-modality conditions, response competition effects were greater in the two- (vs. single-) task conditions irrespective of the level of discrimination task difficulty. In the within-modality conditions, response competition effects were greater in the two-task (vs. single-task) conditions only when these involved a more difficult visual discrimination task. The results provided support for the load theory prediction that executive control load leads to greater distractor interference while highlighting the effects of task modality.
对感觉模态之间（视觉与听觉）和感觉模态之内（仅视觉）的任务协调对分心程度的影响的负荷理论预测进行了测试。将视觉侧翼任务与听觉辨别任务（跨模态条件）或视觉辨别任务（模态内条件）协调时的反应竞争效应与单任务条件进行了比较。在跨模态条件下，无论辨别任务难度如何，双任务（与单任务相比）条件下的反应竞争效应更大。在模态内条件下，只有当双任务涉及更难的视觉辨别任务时，双任务（与单任务相比）条件下的反应竞争效应才更大。这些结果为负荷理论的预测提供了支持，即执行控制负荷会导致更大的干扰物干扰，同时突出了任务模态的影响。
