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The experiments reported below in part I. of this paper were performed in the psychological laboratory of Mount Holyoke College during the year 1905-6. Those reported in part II. were performed in the psychological laboratory of Columbia University during the year 1906-7. Since the further tests which I wished to make must be indefinitely postponed there seems no reason for delaying any longer the publication of these little studies.doi:10.1037/h0073136 fatcat:k72q5hw6rffczcyezyunensmry