Social Pressures in Informal Groups: A Study of Human Factors in Housing

The book argues that the formation of friendship groups in a residential community is governed primarily by functional distance—the architectural arrangement that determines how often people encounter one another in the course of daily routines. This rejects the assumption that friendship formation is driven mainly by similarity of attitudes, background, or personality. Festinger, Schachter, and Back demonstrated that residents living at the ends of courtyards or adjacent to stairwells were far more likely to become friends than those separated by greater functional distance, even when the physical distance was only a matter of yards. The groups that formed around these proximity patterns then developed shared standards and exerted conformity pressures on members, with deviants facing rejection.

The study is credited with establishing the importance of functional distance for relationship formation, demonstrating that variations in the scale of feet—not miles—produce measurable effects on who becomes friends with whom . This concept became foundational for social network analysis and environmental psychology. The research design also attempted to trace the spread of information through social networks, using the housing layout to map pathways of communication . Later work in urban sociology, including Festinger and Kelley's Regent Hill study and Kurt Back's Puerto Rico research, extended the proximity framework to other residential settings . The book is now recognized as one of the early foundations of the structural approach to social networks .

The researchers studied two MIT married-student housing communities: Westgate, consisting of 100 single-family houses arranged in nine U-shaped courts, and the adjacent Westgate West, with 170 families in seventeen two-story reconverted Navy barracks . Because residents were assigned to units on a first-come, first-served basis as the buildings were completed, the researchers could treat the physical layout as an independent variable relatively free from self-selection. Half the houses in each Westgate court were larger and reserved for families with children, introducing further variation. The study combined interviews with all 100 wives in Westgate, sociometric questions about whom residents saw most often, and observational data, allowing the authors to correlate architectural position with friendship patterns .

The book was reviewed in major journals including Social Forces, the British Journal of Medical Psychology, and Educational and Psychological Measurement . When Stanford University Press reissued it in 1963, Edward Levonian noted in his review that the study had become the progenitor of several sociopsychological studies of housing, including Festinger and Kelley's Regent Hill study and Back's later Puerto Rico research . The reissue added two chapters and raised the price from the original Harper edition. Levonian observed that the subtitle—'A Study of Human Factors in Housing'—had become potentially misleading because the term had shifted to connote engineering concerns, when the book actually concerned social relations among residents .

A frequent misreading treats the book as a general theory of group formation applicable to all settings. In fact, the study was tightly bounded: it examined married veteran students in a specific housing development during the immediate post-World War II period. The authors themselves noted that their findings about functional distance and group standards were derived from a particular architectural and social context, not presented as universal laws. Later scholarship, including the editors of Personal Networks, observed that the clarity of the structuralist vision was clouded by the then-common reification of groups and a tendency to focus on normative and functional goals to the exclusion of other factors . The book's value lies in its demonstration of a method and a mechanism, not in providing a comprehensive theory of all group behavior.

Social Pressures in Informal Groups (1950) precedes both Festinger's formal statement of social comparison theory (1954) and his theory of cognitive dissonance (1957), but it anticipates concerns that would become central to both. The book's analysis of how groups generate standards and pressure members toward conformity is a direct precursor to social comparison theory's claim that people evaluate their opinions and abilities by comparison with similar others. The finding that groups reject deviants who fail to conform to group standards also prefigures the dissonance framework's interest in the social conditions that support or undermine belief maintenance. The proximity study thus functions as an empirical foundation on which Festinger built his later theoretical edifice, though the later theories are far more abstract and general.