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| Homophily Analysis× | Isolation Index× | |
|---|---|---|
| Fachgebiet | Sociology | Sociology |
| Familie | Process / pipeline | Process / pipeline |
| Entstehungsjahr≠ | 1954 (concept); 2001 (synthesis) | 1954 |
| Urheber≠ | Lazarsfeld & Merton (concept); McPherson, Smith-Lovin & Cook (synthesis) | Wendell Bell (formalization of P* indices) |
| Typ≠ | Measurement of similarity-based tie formation | Exposure-dimension segregation index |
| Wegweisende Quelle≠ | McPherson, M., Smith-Lovin, L., & Cook, J. M. (2001). Birds of a feather: homophily in social networks. Annual Review of Sociology, 27, 415–444. DOI ↗ | Bell, W. (1954). A probability model for the measurement of ecological segregation. Social Forces, 32(4), 357–364. DOI ↗ |
| Aliasnamen | 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 | 5 |
| Zusammenfassung≠ | 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. |
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