Scott's Pi
Scott's pi is a chance-corrected coefficient of intercoder agreement for two coders working on a nominal scale, introduced by William Scott in 1955 specifically for content analysis. It improves on raw percent agreement by subtracting the agreement two coders would reach by chance, where chance is estimated from a single pooled distribution of categories shared by both coders rather than from each coder's separate marginals.
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Kilder
- Scott, W. A. (1955). Reliability of content analysis: The case of nominal scale coding. Public Opinion Quarterly, 19(3), 321–325. DOI: 10.1086/266577 ↗
- Cohen, J. (1960). A coefficient of agreement for nominal scales. Educational and Psychological Measurement, 20(1), 37–46. DOI: 10.1177/001316446002000104 ↗
- Krippendorff, K. (2004). Content Analysis: An Introduction to Its Methodology (2nd ed.). Thousand Oaks, CA: Sage. ISBN: 9780761915454
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ScholarGate. (2026, June 22). Scott's Pi Intercoder Reliability Coefficient. ScholarGate. https://scholargate.app/no/communication/scott-pi-reliability
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- Holsti's MethodCommunication↔ sammenlign
- Intercoder ReliabilityCommunication↔ sammenlign
- Krippendorff's AlphaCommunication↔ sammenlign
- Manifest Content AnalysisCommunication↔ sammenlign
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