Talarico Diane C, Grant Douglas S
Department of Psychology, University of Alberta, Edmonton, Alta., Canada T6G 2E9.
Behav Processes. 2006 Feb 28;71(2-3):98-106. doi: 10.1016/j.beproc.2005.06.008. Epub 2005 Aug 10.
Pigeons were trained in a matching-to-duration task using short and long filled intervals. Group 2/8 was trained with 2- and 8-s intervals, Group 4/10 with 4- and 10-s intervals, and group marker with 2- and 8-s intervals presented between 1-s start and stop markers. Extended-delay testing showed no significant choose-short effect (CSE) in any group. It was hypothesized that the lack of a CSE may have resulted from use of a variable delay (range 1-3s) during training. The same subjects were employed in Experiment 2 and were trained with a new set of comparisons and one of the alternate types of samples employed in Experiment 1. All training trials involved a 0-s delay. Extended-delay testing revealed a significant CSE in Groups 2/8 and 4/10 but only a weak, and statistically nonsignificant, CSE in group marker. It was concluded that use of a variable delay during training reduced the CSE. The notion that subjective shortening underlies the CSE provided an adequate account of these findings.
鸽子在一个持续时间匹配任务中接受训练，使用短的和长的填充间隔。第2/8组用2秒和8秒的间隔进行训练，第4/10组用4秒和10秒的间隔进行训练，标记组用在1秒开始和停止标记之间呈现的2秒和8秒的间隔进行训练。延长延迟测试显示，任何一组都没有显著的选短效应（CSE）。据推测，缺乏CSE可能是由于训练期间使用了可变延迟（范围为1 - 3秒）。在实验2中使用了相同的受试者，并用一组新的比较以及实验1中使用的一种替代类型的样本进行训练。所有训练试验都涉及0秒延迟。延长延迟测试显示，第2/8组和第4/10组有显著的CSE，但标记组只有微弱的、统计学上不显著的CSE。得出的结论是，训练期间使用可变延迟会降低CSE。主观缩短是CSE的基础这一观点对这些发现提供了充分的解释。
