Clopton B M
J Exp Anal Behav. 1972 May;17(3):473-81. doi: 10.1901/jeab.1972.17-473.
Monkeys were trained to detect 100-msec increments in the intensity of continuous white noise. A response on one of two bars was reinforced with some probability if it conformed to the presence or absence of the increment on that trial. Stimulus parameters of background intensity, increment size, and probability of increment presentation were varied, and response probabilities and latencies were recorded. The task was analogous to the "yes-no" task used in human psychophysics. Data analysis within the context of signal-detection theory revealed response biasing toward one bar or the other to be related to the probability of increment presentation, whereas sensitivity depended on the combination of increment size and background noise intensity. Weber's law was found to hold for a large range of background intensities in that the sensitivity to relative intensity increments varied little. Performance was compared to that of an ideal observer that uses samples of the envelope of the noise waveform on which to base its responses.
猴子经过训练，以检测连续白噪声强度中100毫秒的增量。如果在某一试验中，两个杆之一上的反应符合增量的存在或不存在，那么该反应就会以一定概率得到强化。背景强度、增量大小和增量呈现概率等刺激参数是变化的，并记录反应概率和潜伏期。该任务类似于人类心理物理学中使用的“是-否”任务。信号检测理论背景下的数据分析表明，对某一杆的反应偏差与增量呈现概率有关，而敏感性则取决于增量大小和背景噪声强度的组合。发现韦伯定律在很大范围的背景强度下都成立，即对相对强度增量的敏感性变化很小。将性能与使用噪声波形包络样本作为反应依据的理想观察者的性能进行了比较。
