双任务情境下心理旋转的并行加工机制

The Parallel Process of Mental Rotation in Dual-task Situation

采用心理不应期研究范式，三个反应实验检测了心理旋转任务和其它认知操作任务能否并行加工的问题。在每个实验中要求被试快速、系列地完成对高低音的辨别任务(T1)和不同旋转角度的正反向辨别任务(T2)，T1和T2呈现的时间间隔运用变化的SOA。结果发现：(1)T1的反应选择对T2的反应选择产生了很大的影响，在T2上PRP效应显著。心理旋转的操作成绩随着SOA的缩短而降低。(2)在T1上同样存在随着SOA缩短，反应时增加，正确率下降的趋势。T2的反应选择对T1的反应选择同样产生了显著的影响。(3)T2的反应选择对T1的中枢加工产生了相应的影响，表明当T1的反应选择占据中枢瓶颈时，心理旋转任务和其他认知操作任务在中枢瓶颈中并行得到了有效的加工。

IntroductionLaboratory studies of performance limitations under dual-task conditions typically present two tasks－Task1 (T1) and Task2 (T2)－in rapid succession. The degree of task overlap is varied by manipulating the interval between the onsets of the T1 stimulus and T2 stimulus， known as the stimulus onset asynchrony (SOA). The standard finding is that RT for T1 (RT1) is constant across SOA， but RT for T2 (RT2) increases dramatically as SOA decreases. This slowing of RT2 at short SOA is commonl