An age-irrelevant concept of development.
作者： Donald M. Baer
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参考文章(1)
Wendell E. Jeffrey, Variables in early discrimination learning: I. Motor responses in the training of a left-right discrimination. Child Development. ,vol. 29, pp. 269- 275 ,(1958) , 10.1111/J.1467-8624.1958.TB04884.X