The impetus to research upon this subject given by Darwin was first manifest in the reports of observation upon the expression of different emotions. Fear, anger, joy, were made the subjects of individual monographs. Several brilliant essays, as those by Sully, Dugas, and Bergson, appeared in one field alone, that of laughter. In the last decade there has been a distinct tendency toward the experimental study of the physiological and chemical changes which constitute the inner aspect of emotional responses, as for example, the report of Cannon upon his studies in his book Bodily Changes in Pain, Hunger, Fear, and Rage.
Simultaneous with this study of the physiological aspect of the emotional responses went further observation of its expression, the manifestation of the emotion. The research upon the communication of emotions and ideas proceeded from natural signs to gesture and finally to language. Genetic psychologists pointed out that the natural gesture is an abbreviated act. Mallery's investigation upon "Sign Language among North American Indians Compared with that among Other Peoples and Deaf Mutes" disclosed the high development of communication by gestures among Indian tribes. Wilhelm Wundt in his study of the origin of speech indicated the intimate relation between language and gesture in his conclusion that speech is vocal gesture. Similarly research in the origin of writing derives it, as indicated earlier in this chapter, through the intermediate form of pictographs from pictures.
The significance for social life of the extension of communication through inventions has impressed ethnologists, historians, and sociologists. The ethnologist determines the beginnings of ancient civilization by the invention of writing. Historians have noted and emphasized the relation of the printing press to the transition from medieval to modern society. Graham Wallas in his Great Society interprets modern society as a creation of the machine and of the artificial means of communication.
Sociological interest in language and writing is turning from studies of origins to investigations of their function in group life. Material is now available which indicates the extent to which the group may be studied through its language. Accordingly the point of view for the study of orthodox speech, or "correct" English, is that of the continuity of society; just as the standpoint for the study of heterodox language, or "slang," is that of the life of the group at the moment. The significance of the fact that "every group has its own language" is being recognized in its bearings upon research. Studies of dialects of isolated groups, of the argot of social classes, of the technical terms of occupational groups, of the precise terminology of scientific groups suggest the wide range of concrete materials. The expression "different universes of discourse" indicates how communication separates as well as unites persons and groups.
3. Imitation
Bagehot's Physics and Politics published in 1872, with its chapter on "Imitation," was the first serious account of the nature of the rôle of imitation in social life. Gabriel Tarde, a French magistrate, becoming interested in imitation as an explanation of the behavior of criminals, undertook an extensive observation of its effects in the entire field of human activities. In his book Laws of Imitation, published in 1890, he made imitation synonymous with all intermental activity. "I have always given it (imitation) a very precise and characteristic meaning, that of the action at a distance of one mind upon another.... By imitation I mean every impression of interpsychical photography, so to speak, willed or not willed, passive or active."[155] "The unvarying characteristic of every social fact whatsoever is that it is imitative, and this characteristic belongs exclusively to social facts."[156]
In this unwarranted extension of the concept of imitation Tarde undeniably had committed the unpardonable sin of science, i.e., he substituted for the careful study and patient observation of imitative behavior, easy and glittering generalizations upon uniformities in society. Contributions to an understanding of the actual process of imitation came from psychologists. Baldwin brought forward the concept of circular reaction to explain the interrelation of stimulus and response in imitation. He also indicated the place of imitation in personal development in his description of the dialectic of personal growth where the self develops in a process of give-and-take with other selves. Dewey, Stout, Mead, Henderson, and others, emphasizing the futility of the mystical explanation of imitation by imitation, have pointed out the influence of interest and attention upon imitation as a learning process. Mead, with keen analysis of the social situation, interprets imitation as the process by which the person practices rôles in social life. The studies of Thorndike may be mentioned as representative of the important experimental research upon this subject.
4. Suggestion
The reflective study of imitation originated in attempts at the explanation of uniformities in the behavior of individuals. Research in suggestion began in the narrow but mysterious field of the occult. In 1765 Mesmer secured widespread attention by advancing the theory that heavenly bodies influence human beings by means of a subtle fluid which he called "animal magnetism." Abbé Faria, who came to Paris from India in 1814-15, demonstrated by experiments that the cause of the hypnotic sleep was subjective. With the experiments in 1841 of Dr. James Braid, the originator of the term "hypnotism," the scientific phase of the development of hypnotism began. The acceptance of the facts of hypnotism by the scientific world was the result of the work of Charcot and his students of the so-called Nancy School of Psychology.
From the study of hypnotism to observation upon the rôle of suggestion in social life was a short step. Binet, Sidis, Münsterberg have formulated psychological definitions of suggestion and indicated its significance for an understanding of so-called crowd phenomena in human behavior. Bechterew in his monograph Die Bedeutung der Suggestion im Sozialen Leben has presented an interpretation of distinct value for sociological research. At the present time there are many promising developments in the study of suggestion in special fields, such as advertising, leadership, politics, religion.