Historical. In the last few decades there has been extensive laboratory research in the field of emotions. In place of the older speculative method, an approach to laboratory procedure was found in the early development of experimental techniques, of which the impressive method was one of the first to be standardized and refined.This procedure was first employed by Fechner in his investigations in the field of aesthetics, the results of which were published in his Yorschule der .Flsthetik in 1876 (9). He recognized three particular methods of study. First, the statistical method, by which account was taken of different combinations in actual use, as those found in a certain number of drawing rooms. Second, the method of production, in which the more pleasing impression was produced by the subject, as in drawing. Third, the method of choice, which involved the selection of the most pleasing impression by the observer.