PREMACK D, SCHAEFFER R W
J Exp Anal Behav. 1962 Jan;5(1):89-95. doi: 10.1901/jeab.1962.5-89.
Four rats had continuous access to activity wheels first, then access for 1 hr per day, and, subsequently, continuous access. Limiting S's access to the wheel substantially increased the total frequency of running. A distributional analysis of response duration, burst duration, and interburst interval showed that the increased frequency arose almost entirely from a shortening of the interval between successive bursts. In contrast, speed of the individual response and number of responses per burst changed only negligibly. If S were running, the probability that it would either stop or continue did not differ appreciably for the conditions of continuous or limited access to the wheel. But if S were not running, the probability that it would start running was appreciably greater for limited than for continuous access.
四只大鼠首先可以持续使用活动轮，然后每天使用1小时，随后又可以持续使用。限制大鼠使用活动轮的时间显著增加了总的奔跑频率。对反应持续时间、爆发持续时间和爆发间隔的分布分析表明，频率的增加几乎完全是由于连续爆发之间的间隔缩短。相比之下，单个反应的速度和每次爆发的反应数量变化很小。如果大鼠在奔跑，对于持续使用或限制使用活动轮的条件，它停止或继续奔跑的概率没有明显差异。但是，如果大鼠没有在奔跑，限制使用时它开始奔跑的概率明显高于持续使用时。
