Psychology and Social Sanity

The central argument is that applied psychology can diagnose and remedy the 'popular insanity' Münsterberg perceived in American social life, from the socialism he dismissed as illusory to the sex education movement he considered more harmful than silence . He rejects the assumption that social problems are purely economic or political; for Münsterberg, they are rooted in psychological errors that expert analysis can correct. The book's ten essays each take a social practice—jury deliberation, advertising, investing, dancing—and subject it to psychological scrutiny. The unifying claim is not a theory of society but a methodological confidence: the same experimental psychology that served industry and law can serve public reason, provided the public defers to the expert rather than the crank or the demagogue.

Reception was notably critical of the evidentiary basis. R. M. Ogden, reviewing in Psychological Bulletin (1915), wrote that psychologists would read the volume with interest but regretted that the tests were not extended beyond 'the confines of a class experiment,' which he called 'a rather slender basis for such important and wide-reaching conclusions' . Ogden also argued that positions on sex education and thought transference were 'sufficiently personal to cast doubt upon the propriety of offering them as opinions of the psychologist'—better described as views of a psychologist . The American Journal of Sociology was harsher on the socialism chapter, calling it 'remarkable because so unsatisfactory' and noting that its psychological support amounted to the 'relativity of feeling theory'—that a hundred dollars added to five hundred yields as much joy as ten thousand added to fifty thousand .

Beulah Miller was a village child credited by newspapers with mind-reading powers. Münsterberg personally studied her and concluded that her apparent telepathy was nothing uncanny. The girl was unusually sensitive to subconscious impressions and responded to gestures so slight that the agents themselves did not register them . Her card and number reading depended on interpreting signs unintentionally given by her mother and sister . Münsterberg used the case to arraign the public's credulity and the attempts to exploit the child for gain. The episode exemplifies his broader argument in the book: apparent marvels dissolve under psychological scrutiny, and the public's willingness to believe them is itself a symptom of the social sanity he sought to diagnose and correct.

Münsterberg concluded that the jury system has positive value in reaching correct judgments, provided the jurors are men. Women, he argued, were unsuited to it. The evidence came from a classroom experiment: Harvard students judged which of two cards had more dots, voted, discussed, and voted again. Men improved from 52 percent correct on the first ballot to 78 percent on the last; women remained at 45 percent both times. Forty percent of men's judgments changed, versus 19 percent of women's . Münsterberg remarked that this did not contradict the popular idea that woman easily changes her mind—she changes it, but others cannot change it. Reviewers noted that this class experiment was a slender basis for such a sweeping conclusion about jury reform .

Psychology and Social Sanity extends the psychotechnical method of On the Witness Stand and Psychology and Industrial Efficiency into the domain of social criticism, but with a crucial difference. The earlier books addressed professional audiences—lawyers, employers—with concrete protocols for testimony assessment or worker selection. This volume addresses a general reading public with essays on diverse social practices, from advertising layout to the tango . The method remains consistent: identify a practical problem, apply psychological principles, and draw a conclusion. But the evidentiary standard slips. Where On the Witness Stand could point to experimental psychology's established findings on memory and suggestion, the social essays often rely on single classroom demonstrations or on introspective doctrines like the relativity of feeling, which reviewers found inadequate for the weight placed upon them .

A frequent misreading treats Psychology and Social Sanity as a systematic treatise on social psychology or as a neutral application of experimental findings to public policy. It is neither. The book is frankly designed for popular consumption, as a contemporary review noted, and consists of essays written for a general audience rather than a scholarly one . The arguments are often personal and polemical—Münsterberg's opposition to socialism, his skepticism about sex education, his dismissal of women jurors—rather than derived from a body of research. The book is best read as a document of Progressive-era applied psychology's ambition and its limits: the confidence that laboratory methods could reform society, combined with a tendency to overgeneralize from slender evidence and to mistake cultural prejudice for psychological law.