Madden D J, Allen P A
Percept Psychophys. 1989 Jun;45(6):577-85. doi: 10.3758/bf03208066.
Previous research has suggested that, in visual-search tasks, the comparison between target and display items does not require attentional capacity. In the present experiment we used a secondary-task paradigm to distinguish the amount and duration of the attentional demands of visual search. The subjects performed visual search (the primary task) and tone detection (the secondary task) concurrently over the course of five experimental sessions (1,440 trials). For each subject, target-response mapping was either consistent or varied for Days 1-5. The results indicate that the amount of attentional demand, as reflected in secondary-task performance, increased as a function of display size in the search task. Switching from consistent to varied mapping in a sixth experimental session increased both the amount and the duration of the attentional demands of the search. The present results support models of visual-search performance in which the comparison of target and display items requires attentional capacity.
先前的研究表明，在视觉搜索任务中，目标与显示项目之间的比较不需要注意力资源。在本实验中，我们使用了一种次级任务范式来区分视觉搜索中注意力需求的数量和持续时间。在五个实验阶段（共1440次试验）中，受试者同时执行视觉搜索（主要任务）和音调检测（次级任务）。对于每个受试者，在第1至5天，目标-反应映射要么是一致的，要么是变化的。结果表明，如次级任务表现所反映的，注意力需求的数量随着搜索任务中显示大小的增加而增加。在第六个实验阶段从一致映射切换到变化映射，增加了搜索中注意力需求的数量和持续时间。目前的结果支持了视觉搜索表现的模型，即在这些模型中，目标与显示项目的比较需要注意力资源。
