Los S A
Department of Psychonomics, Vrije Universiteit, HV Amsterdam, The Netherlands.
J Exp Psychol Hum Percept Perform. 1999 Feb;25(1):3-23. doi: 10.1037//0096-1523.25.1.3.
Responding to stimuli of different perceptual categories is usually faster when the categories are presented isolated from each other, in pure blocks, than when they are presented intermixed, in mixed blocks. According to criterion models, these perceptual mixing costs result from the use of a less conservative response criterion in pure than in mixed blocks. According to alternate processing models, mixing costs result from time-consuming switching in mixed blocks between different computational processes called on by the different perceptual categories. In 5 experiments, participants had to identify number stimuli of different categories. The results showed clear mixing costs whenever these categories differed in their assumed computational processing requirements but not when they differed on features that seemed trivial from a computational viewpoint. The results favor the alternate processing conception.
当不同感知类别的刺激以纯粹的组块形式彼此孤立呈现时，对其做出反应通常比对其以混合组块形式混合呈现时更快。根据标准模型，这些感知混合成本源于在纯粹组块中使用的反应标准比在混合组块中使用的反应标准更不保守。根据交替加工模型，混合成本源于在混合组块中，不同感知类别所调用的不同计算过程之间进行耗时的切换。在5个实验中，参与者必须识别不同类别的数字刺激。结果表明，只要这些类别在假定的计算加工要求上存在差异，就会出现明显的混合成本，但当它们在从计算角度看似微不足道的特征上存在差异时，则不会出现混合成本。这些结果支持交替加工概念。
