Keehn J D, Burton M
TIT J Life Sci. 1978;8(3-4):93-7.
Six underweight rats drank in a polydipsic pattern of single post-reinforcement bursts of licking before bar-pressing for subsequent food reinforcers scheduled at fixed 60-sec intervals. With a 60-sec random interval schedule they frequently oscillated between barpressing and drinking. On both schedules mean drink durations were shorter than average inter-reinforcement times, but longer drinks occurred under the fixed-interval schedule. We concluded that intermittent reinforcement entrains drinking because food plus water is more reinforcing than dry food alone, and that polydipsia develops when opportunities for drinking do not compete with opportunities for feeding.
六只体重不足的大鼠在按固定的60秒间隔安排后续食物强化物之前，以单次强化后舔舐的多饮模式饮水，然后进行压杆操作。在60秒随机间隔安排下，它们经常在压杆和饮水之间波动。在这两种安排下，平均饮水持续时间都短于平均强化间隔时间，但在固定间隔安排下会出现更长时间的饮水。我们得出结论，间歇性强化会引发饮水行为，因为食物加饮水比单纯的干粮更具强化作用，并且当饮水机会不与进食机会竞争时就会出现多饮现象。
