Lattal K M
Department of Biology, University of Pennsylvania, 3740 Hamilton Walk, Philadelphia, Pennsylvania 19104, USA.
J Exp Psychol Anim Behav Process. 1999 Oct;25(4):433-50. doi: 10.1037/0097-7403.25.4.433.
Four experiments assessed the effects of trial (T) and intertrial (I) durations on magazine approach behavior in rats. In Experiments 1 and 2, different groups of animals were conditioned with various combinations of I and T durations. The rate of acquisition, in terms of the number of trials required to reach various acquisition criteria, generally was faster in groups trained with large I:T ratios. There also were differences in rate of acquisition and terminal response rates between groups trained with identical I:T ratios but with different absolute I and T durations. Differences evident at the end of conditioning persisted during a common test with various combinations of I and T durations. Experiments 3 and 4 provided a more specific test of the predictions of 2 general classes of theories and found results that were consistent with those theories that characterize group differences as indicative of differences in learning, rather than in performance.
四项实验评估了试验（T）时长和试验间期（I）时长对大鼠接近食盒行为的影响。在实验1和实验2中，不同组的动物接受了不同I和T时长组合的条件训练。就达到不同习得标准所需的试验次数而言，习得速率在接受大I:T比值训练的组中通常更快。在接受相同I:T比值但绝对I和T时长不同的组之间，习得速率和最终反应速率也存在差异。在条件训练结束时明显的差异在随后使用不同I和T时长组合的共同测试中依然存在。实验3和实验4对两类一般理论的预测进行了更具体的检验，结果与那些将组间差异表征为学习差异而非表现差异的理论一致。
