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In social psychology, propinquity (from Latin propinquitas, "nearness") is one of the main factors leading to interpersonal attraction. It refers to the physical or psychological proximity between people. Propinquity can mean physical proximity, a kinship between people, or a similarity in nature between things ("like-attracts-like"). Two people living on the same floor of a building, for example, have a higher propinquity than those living on different floors, just as two people with similar political beliefs possess a higher propinquity than those whose beliefs strongly differ. Propinquity is also one of the factors, set out by Jeremy Bentham, used to measure the amount of (utilitarian) pleasure in a method known as felicific calculus.
Propinquity effect 
The propinquity effect is the tendency for people to form friendships or romantic relationships with those whom they encounter often, forming a bond between subject and friend. Occupational propinquity based on a person's career, is also commonly seen as a factor in marriage selection. Workplace interactions are frequent and this frequent interaction is often a key indicator as to why close relationships can readily form in this type of environment. In other words, relationships tend to form between those who have a high propinquity. It was first theorized by psychologists Leon Festinger, Stanley Schachter, and Kurt Back in what came to be called the Westgate studies conducted at MIT (1950). The typical Euler diagram used to represent the propinquity effect is shown below where U = universe, A = set A, B = set B, and S = similarity:
The sets are basically any relevant subject matter about a person, persons, or non-persons, depending on the context. Propinquity can be more than just physical distance. Residents of an apartment building living near a stairway, for example, tend to have more friends from other floors than those living further from the stairway. The propinquity effect is usually explained by the mere exposure effect, which holds that the more exposure a stimulus gets, the more likeable it becomes.
In a study on interpersonal attraction (Piercey and Piercey, 1972), 23 graduate psychology students, all from the same class, underwent 9 hours of sensitivity training in two groups. Students were given pre- and post-tests to rate their positive and negative attitudes toward each class member. Members of the same sensitivity training group rated each other higher in the post-test than they rated: members of the other group in both the pre- and post-test, and members of their own group in the pre-test. The results indicated that the 9 hours of sensitivity training increased the exposure of students in the same group to each other, and thus they became more likeable to each other.
Propinquity is one of the effects used to study group dynamics. For example, there was a British study done on immigrant Irish women to observe how they interacted with their new environments (Ryan, 2007). This study showed that there were certain people with whom these women became friends much more easily than others, such as classmates, workplace colleagues, and neighbours as a result of shared interests, common situations, and constant interaction. For women who still felt out of place when they began life in a new place, giving birth to children allowed for different ties to be formed, ones with other mothers. Having slightly older children participating in activities such as school clubs and teams also allowed social networks to widen, giving the women a stronger support base, emotional or otherwise.
Types of propinquity 
Various types of propinquity exist, varying from Industry/Occupational Propinquity, in which similar people working in the same field or job tend to be attracted to one another. Residential Propinquity, in which people living in the same area or within neighborhoods of each other tend to come together.Acquaintance Propinquity, a form of proximity in existence when friends tend to have a special bond of interpersonal attraction. Many studies have been performed in assessing various propinquities and their effect on marriage.
Virtual propinquity 
The introduction of instant messaging and video conferencing has reduced the effects of propinquity. Online interactions have facilitated instant and close interactions with people despite a lack of material presence. This allows a notional "virtual propinquity" to work on virtual relationships where people are connected virtually. However, research that came after the development of the internet and email has shown that physical distance is still a powerful predictor of contact, interaction, friendship, and influence.
In popular culture 
An episode of The Many Loves of Dobie Gillis entitled Love is a Science shows Zelda Gilroy assuring Dobie Gillis that he would eventually come to love her through the influence of propinquity, as their similar last names would put them in proximity throughout school. In a 1988 made-for-TV movie based on the series, Dobie and Zelda were portrayed as being married.
On page 478 of Jonathan Franzen's 2010 novel Freedom, Walter attributes his inability to stop having sex with Lalitha to their "daily propinquity."
In William Faulkner's 1936 novel Absalom, Absalom!, Rosa, in explaining to Quentin why she agreed to marry Sutpen, states, "I don't plead propinquity: the fact that I, a woman young and at the age for marrying and in a time when most of the young men whom I would have known ordinarily were dead on lost battlefields, that I lived for two years under the same roof with him."
See also 
- Marvin, D. M., (1918). Occupational propinquity as a factor in marriage selection, University of Pennsylvania.
- Festinger, L., Schachter, S., Back, K., (1950) "The Spatial Ecology of Group Formation", in L. Festinger, S. Schachter, & K. Back (eds.), Social Pressure in Informal Groups, 1950. Chapter 4.
- Piercy, F. P., & Piercy, S. K. (1972). Interpersonal attraction as a function of propinquity in two sensitivity groups. Psychology: A Journal of Human Behavior, 9(1), 27-30.
- Ryan, Louise (2007). "Migrant Women, Social Networks and Motherhood: The Experiences of Irish Nurses in Britain". Sociology 41 (2): 295–312. doi:10.1177/0038038507074975. Retrieved 10 April 2012.
- Martin, Donald M. (1918). Occupational Propinquity as a Factor in Marriage Selection, Vol 16, No.123, pp. 131-150. American Statistical Association.
- Bossard, James H.S.(1932). Residential Propinquity as a factor in Marriage Selection, Vol 38, No.2, pp.219-224. American Journal of Sociology.
- Perry, Martha W.(2006). Instant messaging: virtual propinquity for health promotion networking, 211-2
- Latane, B., Liu, J. H., Nowak, A., Bonevento, M., & Zheng, L. (1995). Distance matters: Physical space and social impact. Personality and Social Psychology Bulletin, 21(8), 795-805.
- [http://www.qwantz.com/index.php?comic=2411 Dinosaur comics
|Look up propinquity in Wiktionary, the free dictionary.|
- Propinquity Effect
- Human Mate Selection – An Exploration of Assortive Mating Preferences – (has two pages of propinquity studies)