Krasnegor N A, Brady J V
J Exp Anal Behav. 1972 Jan;17(1):113-8. doi: 10.1901/jeab.1972.17-113.
The effects of changing signal frequency on a prolonged vigilance task were investigated by systematically increasing the average inter-trial interval between successive signals. During a 6-hr watch, vigilance performance remained constant when the rate of signal presentation was 40, 20, and 10 per hour. When the rate of signal presentation was reduced to 7 or 4 per hour, marked decrements in detection performance were observed. Similar vigilance decrements occurred when the average rate of signals per hour was kept constant (10 per hour) and the probability of receiving a shock for missing a signal was systematically varied. The results of this study indicate the importance of reinforcement factors in the control and maintenance of vigilance performance.
通过系统地增加连续信号之间的平均试次间隔，研究了改变信号频率对长时间警觉任务的影响。在6小时的观察期间，当信号呈现速率为每小时40次、20次和10次时，警觉表现保持不变。当信号呈现速率降至每小时7次或4次时，观察到检测性能显著下降。当每小时信号的平均速率保持恒定（每小时10次），且错过信号而受到电击的概率系统变化时，也出现了类似的警觉下降。本研究结果表明了强化因素在控制和维持警觉性能方面的重要性。
