. The effect of age on habit formation in the albino rat .. . o 10 15 20 25 27 TESTS Each point on the curve rsprsssnts bhs average for 16 trials 167 trials shown here as 27 The asterisk (*) indicates the point of efficiency which had been reached in the learning proper, i.£,,the last six trials of learning.

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanimalbehavior, booky