Terman M
J Exp Anal Behav. 1970 Mar;13(2):145-60. doi: 10.1901/jeab.1970.13-145.
Rats were trained to press one of two keys when a standard intensity value of a 4.0-kHz sine tone (70 or 100 db re 2 x 10(-4) microbar) was presented from a centrally located loudspeaker. Pressing the other key was reinforced when comparison intensity values (as much as 30 db less than the standard value) were presented. The animals initiated tone presentations by breaking a light beam at the rear of the chamber. Correct choices produced brain-stimulation reinforcement, and errors produced a timeout. A procedure designed by Jenkins was used to partial out choice data under potential control of sequential cues in the stimulus series. When the standard-comparison intensity difference was varied, the rats showed similar psychometric functions despite wide differences in response bias (relative position preference). A signal detection analysis showed that response biases for individual animals remained fairly consistent during psychophysical testing. The trend of decreasing choice accuracy at small intensity differences was described by the cumulative normal probability function. The similarity of psychometric functions obtained with 70- and 100-db standards supported Weber's law. There was some evidence that response latencies were controlled by intensity differences even when choice behavior was undifferentiated.
当从位于中央的扬声器发出4.0千赫正弦音的标准强度值（70或100分贝声压级，参考2×10⁻⁴微巴）时，训练大鼠按压两个按键中的一个。当呈现比较强度值（比标准值低多达30分贝）时，按压另一个按键会得到强化。动物通过打破实验箱后部的光束来启动音调呈现。正确选择会产生脑刺激强化，错误则会导致超时。采用了詹金斯设计的程序来排除刺激序列中潜在顺序线索控制下的选择数据。当标准 - 比较强度差异变化时，尽管反应偏差（相对位置偏好）差异很大，大鼠仍表现出相似的心理测量函数。信号检测分析表明，在心理物理学测试期间，个体动物的反应偏差保持相当一致。累积正态概率函数描述了在小强度差异下选择准确性下降的趋势。用70分贝和100分贝标准获得的心理测量函数的相似性支持了韦伯定律。有一些证据表明，即使选择行为没有差异，反应潜伏期也受强度差异控制。
