Davison M C, Kirkwood B J
J Exp Anal Behav. 1968 Mar;11(2):173-6. doi: 10.1901/jeab.1968.11-173.
Human subjects were tested in a free-operant avoidance procedure. Shock could be avoided by the emission of a verbal response of adequate intensity and duration. These schedules were found to control the emission of verbal operants in the same way they control motor operants. Some subjects showed conventional control by this schedule with or without response-produced feedback. Other subjects verbalized at a high rate under both these conditions until the addition of response cost brought this behavior under conventional schedule control.
在自由操作回避程序中对人类受试者进行了测试。通过发出足够强度和持续时间的言语反应可以避免电击。发现这些程序以控制运动操作性行为的相同方式来控制言语操作性行为的发出。一些受试者在有或没有反应产生的反馈的情况下，通过该程序表现出常规控制。其他受试者在这两种情况下都以高频率发声，直到增加反应代价后，这种行为才受到常规程序控制。
