Harrison J M, Briggs R M
J Exp Anal Behav. 1977 Nov;28(3):233-41. doi: 10.1901/jeab.1977.28-233.
Head orientation during auditory discriminations was studies in squirrel monkeys using a two-lever trial-by-trial procedure. Animals were studied using auditory discriminations based on the position of the sound and on the spectral content differences between a pure tone and a noise. After the percentage of correct responses reached asymptote, head orientation was measured using videotape recordings. Orientation occurred on virtually every trial and was under the control of the position of the sound under all conditions. Lever responding was controlled by the same parameters of the sound under some conditions, and by different parameters in others. Orientation and lever responding were correlated (a level response could be predicted from the direction of orientation) when both responses were under the control of the same parameters of the sound. The two responses were uncorrelated when they were controlled by different parameters of the sound. Orientation and lever responding were not functionally related.
利用两杠杆逐次试验程序，对松鼠猴在听觉辨别过程中的头部定向进行了研究。基于声音的位置以及纯音与噪声之间的频谱内容差异，采用听觉辨别对动物进行研究。在正确反应百分比达到渐近线后，使用录像记录测量头部定向。在几乎每一次试验中都会出现定向，并且在所有条件下都受声音位置的控制。在某些条件下，杠杆反应受声音的相同参数控制，而在其他条件下则受不同参数控制。当两种反应都受声音的相同参数控制时，定向和杠杆反应是相关的（可以从定向方向预测水平反应）。当它们受声音的不同参数控制时，这两种反应不相关。定向和杠杆反应在功能上没有关联。
