Science. 1972 Dec 1;178(4064):1002-4. doi: 10.1126/science.178.4064.1002.
A group of pigeons that had previously received noncontingent food delivery acquired the key-peck response (in autoshape training) more slowly than did a naive control group; key-peck acquisition was most rapid for a group given operant treadle-press training in the initial phase.
一组先前接受过非条件食物传递的鸽子在自动形状训练中获得关键啄反应的速度比天真对照组慢;在初始阶段给予操作性踏杆按压训练的鸽子获得关键啄反应的速度最快。