Visual signal detection and the locus of foreperiod effects
Visual signal detection and the locus of foreperiod effects
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视觉信号检测和前期效应轨迹
作者：
R. Klein;B. Kerr
在视觉信号检测任务中，通过改变前周期来确定警觉性对S对外部信号敏感性的影响。在最佳前期之前，可辨别性随前期的增加而增加，超过最佳前期后略有下降。这种结果模式与许多以反应时间为因变量的前期研究密切相似。由于在这个信号检测任务中不需要快速反应，因此得出的结论是，警觉性必须在与反应相关的信息处理阶段之前影响信息处理阶段。其他证据表明，警觉性也不会影响感官阶段。通过消除，警觉性必然影响着中心阶段的运行，本文讨论了波斯纳的警觉性观，其中蕴涵着中心阶段。
The effect of alertness on S’s sensitivity to external signals was determined by varying the foreperiod in a visual signal detection task. Discriminability increased with increasing foreperiods up to an optimal foreperiod, beyond which it decreased slightly. This pattern of results parallels closely that of many foreperiod studies in which reaction time was the dependent variable. Because no speeded response was required in this signal detection task, it was concluded that alertness must be affecting an information processing stage prior to those associated with responding. Other evidence indicates that alertness does not affect sensory stages either. Alertness, by elimination, must be affecting the operation of a central stage, Posner’s view of alertness which implicates the central stages is discussed.