The association must be a purely symbolic one; in other words, the word must denote, tag off, the image, must have no other significance than to serve as a counter to refer to it whenever it is necessary or convenient to do so. Such an association, voluntary and, in a sense, arbitrary as it is, demands a considerable exercise of self—conscious attention. At least to begin with, for habit soon makes the association nearly as automatic as any and more rapid than most
去书内
-
用户823552