Tombu Michael, Jolicoeur Pierre
Department of Psychology, University of Waterloo, Ontario, Canada.
J Exp Psychol Hum Percept Perform. 2003 Feb;29(1):3-18. doi: 10.1037//0096-1523.29.1.3.
The authors present the central capacity sharing (CCS) model and derive equations describing its behaviors to explain results from dual-task situations. The predictions of the CCS model are contrasted with those of the central bottleneck model. The CCS model predicts all of the hallmark effects of the psychological refractory period (PRP) pardigm: -1 slope of the PRP effect at short stimulus onset asynchronies (SOAs), underadditivity of precentral Task 2 manipulations, additivity of central or postcentral Task 2 manipulations with SOA, and carry forward to Task 2 of Task 1 precentral or central manipulations at short SOAs. The CCS model also predicts that Task 1 response times increase with decreasing SOA. The model is a viable alternative to the central bottleneck model.
作者提出了中央容量共享（CCS）模型，并推导了描述其行为的方程，以解释双任务情境下的结果。将CCS模型的预测结果与中央瓶颈模型的预测结果进行了对比。CCS模型预测了心理不应期（PRP）范式的所有标志性效应：在短刺激起始异步（SOA）条件下，PRP效应的斜率为-1；中央前任务2操作的次可加性；中央或中央后任务2操作与SOA的可加性；以及在短SOA条件下，任务1的中央前或中央操作会延续到任务2。CCS模型还预测，任务1的反应时间会随着SOA的减小而增加。该模型是中央瓶颈模型的一个可行替代方案。
