Daly M
Dev Psychobiol. 1976 Jul;9(4):315-23. doi: 10.1002/dev.420090404.
The preweaning behavioral development was compared in 3 hamster species: the golden (Mesocricetus auratus), Chinese (Cricetulus griseus), and Djungarian (Phodopus sungorus). Differences in the age of appearance of action patterns could not be summarized by simply ranking species on either precocity or developmental speed, nor were they eliminated by measuring age from conception. Problems in the interpretation of species differences in the age of appearance of action patterns are discussed.
金黄仓鼠（Mesocricetus auratus）、中国仓鼠（Cricetulus griseus）和黑线毛足鼠（Phodopus sungorus）。动作模式出现年龄的差异无法通过简单地按照早熟或发育速度对物种进行排名来概括，从受孕开始计算年龄也无法消除这些差异。文中讨论了动作模式出现年龄的物种差异解释方面的问题。
