MONITORING CHANGES IN COGNITIVE LOAD DURING READING - AN EVENT-RELATED BRAIN POTENTIAL AND REACTION-TIME ANALYSIS
MONITORING CHANGES IN COGNITIVE LOAD DURING READING - AN EVENT-RELATED BRAIN POTENTIAL AND REACTION-TIME ANALYSIS
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DOI：
10.1037/0278-7393.19.1.51
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发表时间：
1993-01-01
影响因子：
2.6
通讯作者：
RANEY, GE
中科院分区：
文献类型：
--
作者：
RANEY, GE
在阅读过程中，影响认知负荷的因素采用次级任务程序进行研究。在三个实验中，受试者在播放听觉探针的同时连续阅读两组文章。事件相关脑电位和反应时间（RT）反应的N1-P2和P300分量被用作对次级听觉探针的负荷测量。N1-P2反应表明二读时负荷下降，而P300和RT反应表明二读时负荷增加。结果被解释为反映了任务需求的变化。较低水平的任务，如单词识别和局部理解，在第二次阅读时需要较少的资源。N1-P2反映了资源需求的减少。相比之下，在第二次阅读时，用于更高层次过程（如将文本与先前的表征进行比较和更新记忆）的资源数量增加了。这是由于任务要求，强调材料的记忆。P300和RT反映了更高级别需求的增加。结果以注意力和任务需求来描述，并作为对阅读和任务难度成分描述的支持。
Factors that contribute to cognitive load during reading were examined using a secondary task procedure. In three experiments, subjects read sets of passages twice in succession while auditory probes were presented. The N1-P2 and P300 components of the event-related brain potential and reaction time (RT) responses to secondary auditory probes were used as measures of load. N1-P2 responses indicated decreased load during the second reading, whereas P300 and RT responses indicated increased load during the second reading. The results are interpreted as reflecting changes in task demands. Lower level elements of the task, such as word recognition and local aspects of comprehension, required fewer resources during the second reading. The N1-P2 reflected this reduction in resource demands. By contrast, the amount of resources devoted to higher level processes, such as comparing the text with one's prior representation and updating memory, increased during the second reading. This resulted from task demands, which emphasized memory of the material. P300 and RT reflected this increase in higher level demands. Results are described in terms of attentional and task demands and are taken as support for a componential description of reading and task difficulty.