Molet Mikaël, Zentall Thomas R
Department of Psychology, University of Lille 3, Lille, France.
Psychon Bull Rev. 2008 Apr;15(2):431-6. doi: 10.3758/pbr.15.2.431.
Humans were trained on two independent temporal discriminations, with correct choice dependent on the initial stimulus duration. In Experiment 1, the durations were 1.0 and 4.0 sec, with one set of choice stimuli, and 2.0 and 8.0 sec, with a different set of choice stimuli. The 2.0- and 4.0-sec values were selected to be the geometric mean of the two values in the other discrimination. In Experiment 2, the durations were 2.0 and 5.0 sec for one discrimination and 3.5 and 6.5 sec for the other. The 3.5- and 5.0-sec values were selected to be the arithmetic mean of the two values in the other discrimination. In both experiments, participants showed evidence for relational coding of the duration pairs. That is, the test durations were selected to be at the presumed bisection point (i.e., they should have produced indifferent choice), but instead the shorter test duration from the longer duration pair produced a "short" bias (in both experiments), whereas the longer duration from the shorter duration pair produced a "long" bias (in the second experiment). Results were similar to those from Zentall, Weaver, and Clement (2004) with pigeons.
人类接受了两种独立的时间辨别训练，正确选择取决于初始刺激持续时间。在实验1中，持续时间分别为1.0秒和4.0秒，使用一组选择刺激；以及2.0秒和8.0秒，使用另一组不同的选择刺激。2.0秒和4.0秒的值被选为另一辨别中两个值的几何平均数。在实验2中，一种辨别的持续时间为2.0秒和5.0秒，另一种辨别的持续时间为3.5秒和6.5秒。3.5秒和5.0秒的值被选为另一辨别中两个值的算术平均数。在两个实验中，参与者都表现出对持续时间对进行关系编码的证据。也就是说，测试持续时间被选为假定的平分点（即，它们应该产生无差异的选择），但相反，较长持续时间对中的较短测试持续时间产生了“短”偏差（在两个实验中都是如此），而较短持续时间对中的较长持续时间产生了“长”偏差（在第二个实验中）。结果与曾塔尔、韦弗和克莱门特（2004年）对鸽子的研究结果相似。
