Miller Jeff, Sproesser Gudrun, Ulrich Rolf
Department of Psychology, University of Otago, Dunedin, New Zealand.
Percept Psychophys. 2008 Jul;70(5):878-86. doi: 10.3758/pp.70.5.878.
In two experiments, we used response signals (RSs) to control processing time and trace out speed--accuracy trade-off(SAT) functions in a difficult perceptual discrimination task. Each experiment compared performance in blocks of trials with constant and, hence, temporally predictable RS lags against performance in blocks with variable, unpredictable RS lags. In both experiments, essentially equivalent SAT functions were observed with constant and variable RS lags. We conclude that there is little effect of advance preparation for a given processing time, suggesting that the discrimination mechanisms underlying SAT functions are driven solely by bottom-up information processing in perceptual discrimination tasks.
在两项实验中，我们使用反应信号（RSs）来控制处理时间，并在一项困难的知觉辨别任务中描绘出速度-准确性权衡（SAT）函数。每个实验都比较了在具有恒定且因此在时间上可预测的RS延迟的试验块中的表现，与在具有可变、不可预测的RS延迟的试验块中的表现。在两项实验中，恒定和可变RS延迟都观察到了基本等效的SAT函数。我们得出结论，对于给定的处理时间，提前准备的影响很小，这表明SAT函数背后的辨别机制仅由知觉辨别任务中的自下而上的信息处理驱动。
