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  1. 1
    The effect of praise and competition on the persisting behavior of kindergarten children /
    图书
    由 Wolf, Theta Holmes, 1904-
    出版 1938
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  2. 2
    Effects of praise and blame : results of the class teacher's incentives upon achievement and attitudes of school-children.
    图书
    由 Johannesson, Ingvar
    出版 1967
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