Zachary Karate Club Network
A University karate club (W.W. Zachary observation study) dataset of 34 nodes and 78 edges, collected by W.W. Zachary. Each record contains directed: False, weighted: False, signed: False. The most widely cited network in graph research — 34-node karate club that split into two factions, used to validate virtually every community detection algorithm.. Suitable for community detection benchmark, foundational social network analysis.
Cite this dataset at
ucidata-zachary.echo.directory
Analytics
Node size is centrality, colour is community. Hover a node for details; click one to isolate its community.
Computed over the full corpus.
Record
- Catalog key
ucidata-zachary- Authors
- Zachary, Wayne W.
- Year
- 1977
- Source paper
- An Information Flow Model for Conflict and Fission in Small Groups
- DOI / arXiv
- 10.1086/jar.33.4.3629752
- License
- CC BY-SA 2.0 Germany (as stated by KONECT) (LicenseRef-CC-BY-SA-2.0-DE)
- Records
- 34
- Nodes
- 34
- Edges
- 78
- Nodes are
- person
- Edges are
- friendship
- Attributes
- nodes have no attributes; edges have no attributes
- Languages
- en
- Collected
- 1977 (Before 1990)
- Tasks
- From the graph: link prediction, community detection
Provenance
- Originally published at
- https://konect.cc/networks/ucidata-zachary/ unverified
- Hosted copy
- Mirrored on echo.directory on 2026-10-02, 1.8 KB across 1 files. Checksums in MANIFEST.json.
Citations
An Information Flow Model for Conflict and Fission in Small Groups
Konstantin Avrachenkov, Aleksei Yu. Kondratev, V. Mazalov
Journal Article · Journal of Anthropological Research · 1977
Cited by
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Serina Chang, Alicja Chaszczewicz et al. · International Conference on Web and Social Media · 2024 · cited 50× - The Ising model celebrates a century of interdisciplinary contributions
Michael W. Macy, B. Szymanski et al. · npj Complexity · 2024 · cited 41×
Show all 10
- Efficient Unsupervised Community Search with Pre-trained Graph Transformer
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H. Zhang, Gang Kou et al. · Information Sciences · 2023 · cited 34× - Community detection algorithm for social network based on node intimacy and graph embedding model
Di Huang, Jinbao Song et al. · Engineering applications of artificial intelligence · 2024 · cited 32× - A Novel Method to Identify Key Nodes in Complex Networks Based on Degree and Neighborhood Information
Na Zhao, Shuang-ping Yang et al. · Applied Sciences · 2024 · cited 31× - Spiking Graph Neural Network on Riemannian Manifolds
Li Sun, Zhen-Hao Huang et al. · Neural Information Processing Systems · 2024 · cited 29×
Citation data from Semantic Scholar, retrieved 2026-10-19.
How to cite
BibTeX
@misc{echo2026,
title = {ECHO: Exploratory Compendium of Humanity Online},
author = {Switzer, Braden and Zafarani, Reza},
year = {2026},
url = {https://echo.directory},
note = {Syracuse University}
}
@article{Zachary_1977,
title = {An Information Flow Model for Conflict and Fission in Small Groups},
volume = {33},
issn = {2153-3806},
url = {http://dx.doi.org/10.1086/jar.33.4.3629752},
doi = {10.1086/jar.33.4.3629752},
number = {4},
journal = {Journal of Anthropological Research},
publisher = {University of Chicago Press},
author = {Zachary, Wayne W.},
year = {1977},
month = Dec,
pages = {452–473}
} APA
Switzer, B., & Zafarani, R. (2026). ECHO: Exploratory Compendium of Humanity Online [Data repository]. Syracuse University. https://echo.directory
Zachary, W. W. (1977). Zachary Karate Club Network [Data set]. https://doi.org/10.1086/jar.33.4.3629752
MLA
Switzer, Braden, and Reza Zafarani. ECHO: Exploratory Compendium of Humanity Online. Syracuse University, 2026, echo.directory.
Zachary, Wayne W. Zachary Karate Club Network. 1977, doi.org/10.1086/jar.33.4.3629752.