Wilkie D M
Department of Psychology, The University of British Columbia, Vancouver Canada V6T 1Y7.
Behav Processes. 1986 Mar;12(3):287-97. doi: 10.1016/0376-6357(86)90042-2.
A novel delayed conditional discrimination procedure was used successfully to investigate some factors affecting pigeons' tracking of visual stimuli. Trials began with the brief illumination of one of the keys (randomly selected) from the left- or right-hand column of a three by three matrix of pecking keys. Then the next key in the same row was briefly lit. Finally, the remaining key in the row was lit along with one (randomly chosen) of the remaining five keys from the left- or right-hand columns. A peck to the former but not the latter key was designated as correct and was rewarded. In Experiment 1 pigeons made correct choices on between 70 and 80 percent of trials, thereby demonstrating an ability to visually track objects. In Experiment 2 tracking accuracy was: a) reduced when either the first or second key in the sequence was omitted, b) improved when the sequence was repeated three times, c) reduced when duration of key illumination was reduced, and d) reduced by delays imposed between keys early but not late in the sequence. It was also found that tracking of vertical and horizontal sequences was approximately equal.
一种新颖的延迟条件辨别程序被成功用于研究影响鸽子视觉刺激追踪的一些因素。试验开始时，从一个三乘三啄键矩阵的左手列或右手列中随机选择一个键进行短暂照明。然后同一行中的下一个键被短暂点亮。最后，该行中剩下的键与左手列或右手列中剩下的五个键中的一个（随机选择）一起被点亮。啄前者而非后者的键被指定为正确并给予奖励。在实验1中，鸽子在70%到80%的试验中做出了正确选择，从而证明了其视觉追踪物体的能力。在实验2中，追踪准确性如下：a）当序列中的第一个或第二个键被省略时降低；b）当序列重复三次时提高；c）当键照明持续时间缩短时降低；d）当序列早期而非晚期的键之间施加延迟时降低。还发现垂直和水平序列的追踪大致相同。
