Flory R K, Smith E L, Ellis B B
J Exp Anal Behav. 1977 Jan;27(1):5-15. doi: 10.1901/jeab.1977.27-5.
Pecks against a stuffed pigeon were reinforced according to a fixed-interval schedule for one group of pigeons and a variable-interval schedule for a second group. Red and green stimulus lights were alternately illuminated. Subsequently, food deliveries no longer occurred during one color (extinction). In the presence of the other color, food was presented only when no attack occurred for 30 sec. When attack produced food, all pigeons generally exhibited characteristic fixed-interval or variable-interval response patterns. Two birds in each group frequently exhibited postreinforcement schedule-induced aggression. Attack was reduced to low levels at approximately the same rate by extinction and differential reinforcement of other behavior. For birds that had previously exhibited schedule-induced aggression the initial reduction of attack during the second experimental phase was followed by induced attack immediately after food delivery in the differential-reinforcement-of-other-behavior component and upon onset of the extinction component, Either extinction or differential reinforcement of other behavior may eliminate reinforced aggression but may be relatively ineffective for reducing induced attack.
对一组鸽子，按照固定间隔程序强化其对填充鸽子的啄击行为；对另一组鸽子，则按照可变间隔程序进行强化。红色和绿色刺激光交替亮起。随后，在一种颜色出现期间不再提供食物（消退）。在另一种颜色出现时，只有在30秒内没有攻击行为时才提供食物。当攻击行为能获得食物时，所有鸽子通常都表现出典型的固定间隔或可变间隔反应模式。每组中有两只鸟频繁表现出强化后程序诱导的攻击行为。通过消退和对其他行为的差别强化，攻击行为以大致相同的速率降低到低水平。对于先前表现出程序诱导攻击行为的鸟类，在第二个实验阶段，攻击行为最初减少，随后在差别强化其他行为成分中食物递送后以及消退成分开始时立即出现诱导攻击。无论是消退还是对其他行为的差别强化，都可能消除强化的攻击行为，但对于减少诱导攻击可能相对无效。
