Nozawa G, Reuter-Lorenz P A, Hughes H C
Department of Psychology, Dartmouth College, Hanover, NH 03755.
Biol Cybern. 1994;72(1):19-34. doi: 10.1007/BF00206235.
Saccadic reaction times (SRTs) were analyzed in the context of stochastic models of information processing (e.g., Townsend and Ashby 1983) to reveal the processing architecture(s) underlying integrative interactions between visual and auditory inputs and the mechanisms of express saccades. The results support the following conclusions. Bimodal (visual+auditory) targets are processed in parallel, and facilitate SRT to an extent that exceeds levels attainable by probability summation. This strongly implies neural summation between elements responding to spatially aligned visual and auditory inputs in the human oculomotor system. Second, express saccades are produced within a separable processing stage that is organized in series with that responsible for intersensory integration. A model is developed that implements this combination of parallel and serial processing. The activity in parallel input channels is summed within a sensory stage which is organized in series with a pre-motor and motor stage. The time course of each subprocess is considered a random variable, and different experimental manipulations can selectively influence different stages. Parallels between the model and physiological data are explored.
在信息处理的随机模型（例如，Townsend和Ashby，1983）的背景下，分析了扫视反应时间（SRT），以揭示视觉和听觉输入之间整合交互作用以及快速扫视机制背后的处理架构。结果支持以下结论。双峰（视觉+听觉）目标是并行处理的，并且促进SRT的程度超过了概率求和所能达到的水平。这强烈暗示了人类动眼系统中对空间对齐的视觉和听觉输入做出反应的元素之间的神经总和。其次，快速扫视是在一个可分离的处理阶段内产生的，该阶段与负责跨感觉整合的阶段串联组织。开发了一个模型来实现这种并行和串行处理的组合。并行输入通道中的活动在一个感觉阶段内求和，该感觉阶段与一个运动前和运动阶段串联组织。每个子过程的时间进程被视为一个随机变量，不同的实验操作可以选择性地影响不同的阶段。探讨了该模型与生理数据之间的相似性。
