Structural cohesion: Difference between revisions
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{{Short description|Lowest number of people removed to disconnect a social group}} |
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{{technical|date=August 2016}} |
{{technical|date=August 2016}} |
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In [[sociology]], '''structural cohesion''' is the conception<ref> |
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{{cite journal |
{{cite journal |
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|last = N |
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|first = T |
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|author2 = White, Douglas |
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|authorlink2 = Douglas R. White |
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|title = Structural Cohesion and Embeddedness: A Hierarchical Concept of Social Groups. |
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|journal = [[American Sociological Review]] |
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|volume = 68 |
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|issue = 1 |
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|pages = 1–25 |
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|year = 2003 |
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⚫ | |||
| publisher = |
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|access-date = 2006-08-19 |
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⚫ | |||
|doi = 10.2307/3088904 |
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| format = [[PDF]] |
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|url-status = dead |
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| id = |
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|archive-url = https://web.archive.org/web/20060927142539/http://www2.asanet.org/journals/ASRFeb03MoodyWhite.pdf |
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| accessdate = 2006-08-19 |
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|archive-date = 2006-09-27 |
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| doi=10.2307/3088904}}</ref><ref> |
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|jstor = 3088904 |
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}}</ref><ref> |
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{{cite journal |
{{cite journal |
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| last = White |
| last = White |
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| first = Douglas |
| first = Douglas |
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| authorlink = Douglas R. White |
| authorlink = Douglas R. White |
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|author2= |
|author2=Frank Harary |
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| title = The Cohesiveness of Blocks in Social Networks: Node Connectivity and Conditional Density. |
| title = The Cohesiveness of Blocks in Social Networks: Node Connectivity and Conditional Density. |
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| journal = Sociological Methodology |
| journal = Sociological Methodology |
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| volume = 31 |
| volume = 31 |
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| issue = 1 |
| issue = 1 |
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| pages = 305–359 |
| pages = 305–359 |
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| year = 2001 |
| year = 2001 |
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| publisher = Blackwell Publishers, Inc., Boston, USA and Oxford, UK. |
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| url = http://eclectic.ss.uci.edu/~drwhite/sm-w23.PDF |
| url = http://eclectic.ss.uci.edu/~drwhite/sm-w23.PDF |
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| format = book |
| format = book |
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| id = |
| id = |
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| |
| access-date = 2012-08-13 |
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| doi = 10.1111/0081-1750.00098 | citeseerx = 10.1.1.304.3296 |
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⚫ | |||
| s2cid = 15806800 |
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| author2-link = Frank Harary |
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⚫ | }}</ref> of a useful formal definition and measure of [[Social cohesion|cohesion]] in [[social groups]]. It is defined as the minimal number of actors in a [[social network]] that need to be removed to disconnect the group. It is thus identical to the question of the node [[connectivity (graph theory)|connectivity]] of a given [[Graph (discrete mathematics)|graph]] in [[discrete mathematics]]. The vertex-cut version of [[Menger's theorem]] also proves that the disconnection number is equivalent to a maximally sized group with a network in which every pair of persons has at least this number of separate paths between them. It is also useful to know that {{mvar|k}}-cohesive graphs (or {{mvar|k}}-components) are always a subgraph of a [[k-core|{{mvar|k}}-core]], although a {{mvar|k}}-core is not always {{mvar|k}}-cohesive. A {{mvar|k}}-core is simply a subgraph in which all nodes have at least {{mvar|k}} neighbors but it need not even be connected. |
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The boundaries of [[structural endogamy]] in a kinship group are a special case of structural cohesion. |
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== Software == |
== Software == |
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[http://intersci.ss.uci.edu/wiki/index.php/Cohesive_blocking Cohesive.blocking] is the R program for computing structural cohesion according to the Moody-White (2003) [[algorithm]]. This wiki site provides numerous examples and a tutorial for use with R. |
[https://web.archive.org/web/20080313044932/http://intersci.ss.uci.edu/wiki/index.php/Cohesive_blocking Cohesive.blocking] is the R program for computing structural cohesion according to the Moody-White (2003) [[algorithm]]. This wiki site provides numerous examples and a tutorial for use with R. |
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== Examples == |
== Examples == |
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{{Social networking}} |
{{Social networking}} |
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[[Category:Social |
[[Category:Social network analysis]] |
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[[Category:Graph connectivity]] |
[[Category:Graph connectivity]] |
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[[Category:Network analysis]] |
[[Category:Network analysis]] |
Latest revision as of 14:43, 8 December 2022
This article may be too technical for most readers to understand.(August 2016) |
In sociology, structural cohesion is the conception[1][2] of a useful formal definition and measure of cohesion in social groups. It is defined as the minimal number of actors in a social network that need to be removed to disconnect the group. It is thus identical to the question of the node connectivity of a given graph in discrete mathematics. The vertex-cut version of Menger's theorem also proves that the disconnection number is equivalent to a maximally sized group with a network in which every pair of persons has at least this number of separate paths between them. It is also useful to know that k-cohesive graphs (or k-components) are always a subgraph of a k-core, although a k-core is not always k-cohesive. A k-core is simply a subgraph in which all nodes have at least k neighbors but it need not even be connected.
The boundaries of structural endogamy in a kinship group are a special case of structural cohesion.
Software[edit]
Cohesive.blocking is the R program for computing structural cohesion according to the Moody-White (2003) algorithm. This wiki site provides numerous examples and a tutorial for use with R.
Examples[edit]
Some illustrative examples are presented in the gallery below:
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The 6-node ring in the graph has connectivity-2 or a level 2 of structural cohesion because the removal of two nodes is needed to disconnect it.
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The 6-node component (1-connected) has an embedded 2-component, nodes 1-5
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A 6-node clique is a 5-component, structural cohesion 5
Perceived cohesion[edit]
Perceived Cohesion Scale (PCS) is a six item scale that is used to measure structural cohesion in groups. In 1990, Bollen and Hoyle used the PCS and applied it to a study of large groups which were used to assess the psychometric qualities of their scale.[3]
See also[edit]
References[edit]
- ^ N, T; White, Douglas (2003). "Structural Cohesion and Embeddedness: A Hierarchical Concept of Social Groups" (PDF). American Sociological Review. 68 (1): 1–25. doi:10.2307/3088904. JSTOR 3088904. Archived from the original (PDF) on 2006-09-27. Retrieved 2006-08-19.
- ^ White, Douglas; Frank Harary (2001). "The Cohesiveness of Blocks in Social Networks: Node Connectivity and Conditional Density" (book). Sociological Methodology. 31 (1): 305–359. CiteSeerX 10.1.1.304.3296. doi:10.1111/0081-1750.00098. S2CID 15806800. Retrieved 2012-08-13.
- ^ Chin, Wynne W., et al. Perceived Cohesion: A Conceptual and Empirical Examination: Adapting and Testing the Perceived Cohesion Scale in a Small-Group Setting. 1999. Small Group Research 30(6):751-766.