Bartashunas C, Suboski M D
Dev Psychobiol. 1984 Mar;17(2):121-7. doi: 10.1002/dev.420170203.
A "pecking" arrow releases and directs pecking by neonatal chicks. Distinctive stimuli placed on or near the tip of the moving arrow lead to pecking that is selectively directed to matching stimuli. A total of 3 min of exposure to such modeling conditions results in remarkable persistence of imitative behavior. Matching stimuli are preferentially pecked 3 days later after three intervening tests without modeling. In contrast to the sensitive period for filial imprinting within the first 3 days posthatch, age of chick at training has no permanent effect on the development of pecking preferences. If anything, filial imprinting interferes with released-directed pecking, suggesting that separate processes are involved.
一支“啄食”箭头能引发并引导新生雏鸡的啄食行为。置于移动箭头尖端或其附近的独特刺激会引发啄食行为，且这种啄食行为会有选择地指向与之匹配的刺激物。总共3分钟的此类模仿条件暴露会导致模仿行为显著持续。在经过三次无模仿的中间测试后，三天后雏鸡会优先啄食匹配的刺激物。与孵化后前三天内亲子印记的敏感期不同，训练时雏鸡的年龄对啄食偏好的发展没有永久性影响。如果说有什么影响的话，亲子印记会干扰引发引导的啄食行为，这表明涉及不同的过程。
