多任务信息加工中的多道分时机制

学术界常用结构理论和资源理论来解释人在多任务信息加工中的作业表现。在多任务中起主要作用的认知能力，其表现形式主要为信息处理的速率以及加工和存储的容量。本研究利用多任务和任务速率的变化来研究信息处理的速率和多任务作业成绩的关系，认为大脑运行的时钟速率是资源的一种形式，大脑对该资源的分配采用多道分时的机制，某个任务获得的时间片越多，该任务的工作绩效就越好。研究表明，在一定的负荷下，信号速率的加快，任务数量的增加，人的作业成绩随着可用时间片的减少而下降。

MULTICHANNEL TIME-SHARING MECHANISM UNDER MULTIPLE TASK CONDITIONS

Structure theory and resource theory were used to explain the performance of multiple task. Cognitive ability played a major role in multiple tasks in form of the rate of information processing and the capacity of storing and manipulating information. The purpose of this study was to find out the relationship between the rate of information processing and the performance of mufti-task as task rate changes and task number increases. We hypothesized that resource included the clock of brain process, working memory and set of process instructions. The mechanism of clock distribution is multichannel time-sharing . The results showed that as the speed of task signals increased, the performance became worse under the condition of certai work load. The implications of the present study were discussed.