Methoden vergleichen

	Blockmodeling	Homophily Analysis	Isolation Index
Fachgebiet	Sociology	Sociology	Sociology
Familie	Process / pipeline	Process / pipeline	Process / pipeline
Entstehungsjahr	1976	1954 (concept); 2001 (synthesis)	1954
Urheber	Harrison White, Scott Boorman & Ronald Breiger	Lazarsfeld & Merton (concept); McPherson, Smith-Lovin & Cook (synthesis)	Wendell Bell (formalization of P* indices)
Typ	Network partitioning into positions and a reduced role structure	Measurement of similarity-based tie formation	Exposure-dimension segregation index
Wegweisende Quelle	White, H. C., Boorman, S. A., & Breiger, R. L. (1976). Social structure from multiple networks. I. Blockmodels of roles and positions. American Journal of Sociology, 81(4), 730–780.	McPherson, M., Smith-Lovin, L., & Cook, J. M. (2001). Birds of a feather: homophily in social networks. Annual Review of Sociology, 27, 415–444.	Bell, W. (1954). A probability model for the measurement of ecological segregation. Social Forces, 32(4), 357–364.
Aliasnamen	block modeling, blockmodel analysis, generalized blockmodeling, CONCOR	homophily measurement, assortative mixing analysis, birds-of-a-feather analysis, tie-similarity analysis	P* isolation index, interaction index, exposure index, Bell isolation index
Verwandt	4	4	5
Zusammenfassung	Blockmodeling is a family of methods that simplify a social network by partitioning its actors into positions — groups of actors who are equivalent in their pattern of ties — and summarizing the relations between positions as a compact image, or reduced role structure. Introduced by Harrison White, Scott Boorman, and Ronald Breiger in 1976, it shifts attention from individuals to the structural roles they occupy.	Homophily analysis quantifies the tendency of similar individuals to form ties — the principle that 'birds of a feather flock together'. It compares the rate at which people connect with others who share an attribute (race, gender, age, education, attitudes) against what would be expected by chance, distinguishing the homophily that arises merely from group sizes from the genuine, behavior-driven preference for similar others.	The isolation index measures the exposure dimension of segregation: the extent to which members of a minority group are exposed only to one another rather than to members of other groups. It answers the question 'what is the own-group share of the typical neighbor (or classmate, or coworker) that a member of the focal group encounters?' Unlike evenness measures, it depends on the relative size of the group as well as its spatial distribution.