School of Medicine, Department of General Practice - Family Medicine, V.N. Karazin Kharkiv National University, Svobody sq., 4, Kharkiv, 61022, Ukraine.
Anim Cogn. 2021 Nov;24(6):1329-1338. doi: 10.1007/s10071-021-01526-z. Epub 2021 Jun 5.
We trained eight pigeons (Columba livia) on a stagewise go/no-go visual discrimination task. A total of 16 visual stimuli were created from all possible combinations of four binary dimensions: brightness (dark/bright), size (large/small), line orientation (vertical/horizontal), and shape (circle/square). In the first stage, we presented S + and four S- stimuli: sharing one (brightness), two (brightness and orientation), three (brightness, orientation, and size), or no dimensional values with S + . In the second stage, all 16 stimuli were presented. In the first stage, stimulus discrimination was controlled by the number of dimensional disparities between non-rewarded stimuli and a rewarded one rather than by stimulus dimensional salience, whereas at the beginning of the second stage, pigeon behaviour was controlled mainly by dimensional reinforcement expectancy learned in the first stage. At the beginning of the second stage, pigeons correctly rejected 6-8 of 11 new added S- stimuli. A significant inverse correlation between the number of S- stimuli sharing dimension values with S + in the first stage and the dimensional discrimination ratios at the beginning of the second stage was found.
我们在一个分阶段的视觉辨别任务上训练了八只鸽子（鸽形目鸠鸽科鸽属鸟类）。总共从四个二进制维度（亮度[暗/亮]、大小[大/小]、线方向[垂直/水平]和形状[圆/方]）的所有可能组合中创建了 16 个视觉刺激。在第一阶段，我们呈现 S+和四个 S-刺激：与 S+共享一个维度值（亮度）、两个维度值（亮度和方向）、三个维度值（亮度、方向和大小）或没有维度值。在第二阶段，呈现了所有 16 个刺激。在第一阶段，刺激辨别受到非奖励刺激与奖励刺激之间的维度差异数量的控制，而不是受刺激维度显著性的控制，而在第二阶段开始时，鸽子的行为主要受第一阶段中学习的维度强化期望控制。在第二阶段开始时，鸽子正确拒绝了 11 个新添加的 S-刺激中的 6-8 个。在第一阶段与 S+共享维度值的 S-刺激数量与第二阶段开始时的维度辨别率之间存在显著的负相关。
