Caetano Marcelo S, Guilhardi Paulo, Church Russell M
Department of Psychology, Brown University, Box 1853, Providence, RI 02912, USA.
Behav Processes. 2007 Jun;75(2):176-81. doi: 10.1016/j.beproc.2007.02.020. Epub 2007 Mar 1.
Secondary data analysis was used to compare responding early on a transfer test from rats previously trained simultaneously or successively on multiple temporal discriminations for the same number of trials [Guilhardi, P., Church, R.M., 2005 a. Dynamics of temporal discrimination. Learn. Behav., 33, 399-416]. Three fixed intervals (30, 60, and 120 s) were signaled by three stimuli (light, noise, and clicker). Twelve rats were trained with the three stimulus-interval pairs intermixed on each experimental session (simultaneous condition); 12 other rats were trained in successive blocks of 10 sessions on each pair (blocked condition). Then, all rats had a transfer test in which all three stimulus-interval pairs were presented intermixed on each session. Rats in the simultaneous and blocked condition responded similarly during training, but differently during early stages of the transfer test. One possibility is that rats in the blocked condition were controlled by the previous interval, not by the current stimulus. These results challenge the usual assumptions from models of timing and conditioning that both simultaneous and blocked training produce learning of the associations between stimulus and interval in a multiple interval training task.
二次数据分析用于比较在转移测试中早期做出反应的情况，这些大鼠之前在相同次数的试验中同时或相继接受了多种时间辨别训练[吉尔哈迪，P.，丘奇，R.M.，2005a。时间辨别的动态。学习与行为，33，399 - 416]。三个固定间隔（30、60和120秒）由三种刺激（光、噪声和点击器）表示。12只大鼠在每个实验环节中混合使用这三对刺激 - 间隔组合进行训练（同时条件）；另外12只大鼠在每个组合上以连续的10个环节为一组进行训练（分组条件）。然后，所有大鼠都进行了转移测试，在每个环节中混合呈现所有三对刺激 - 间隔组合。同时条件和分组条件下的大鼠在训练期间反应相似，但在转移测试的早期阶段反应不同。一种可能性是，分组条件下的大鼠受先前间隔的控制，而不是当前刺激的控制。这些结果挑战了时间和条件作用模型通常的假设，即在多间隔训练任务中，同时训练和分组训练都会产生刺激与间隔之间关联的学习。
