coefficient of concordance
Definition
- Noun (Statistics): A statistical measure that quantifies the degree of agreement or consistency among multiple rankings of the same set of items. It assesses how similar the rank orders are across different judges, raters, or measurement methods.
Usage
The coefficient of concordance is used to analyze the reliability of rankings in fields like psychology, market research, and social sciences. It is a single number, typically denoted by W (Kendall's W), ranging from 0 (no agreement) to 1 (perfect agreement).
Examples
- Noun:
- The researchers calculated a coefficient of concordance to measure the agreement among the five judges' rankings of the contestants.
- A high coefficient of concordance (W = 0.85) indicated strong consensus in the panel's assessment of the proposals.
Advanced Usage
- Kendall's coefficient of concordance (W): The specific name for this statistic, developed by Maurice Kendall. It is the standard measure used for this purpose.
- Kendall's coefficient of concordance is preferred when dealing with a small number of raters ranking many items.
Variants and Related Words
- Concordance (n): The state of agreement or harmony. In statistics, it refers to the consistency between ranked orders.
- Inter-rater reliability (n): A broader term for the consistency of measurements between different raters, for which the coefficient of concordance is one specific measure.
Synonyms
- Agreement coefficient
- Concordance coefficient
- Kendall's W
Related Terms (Not Phrasal Verbs)
- Rank correlation: A family of statistics (like Spearman's rho) that measure the relationship between two ranked variables. The coefficient of concordance extends this concept to more than two rankers.
- Interclass correlation: Another statistical method for measuring agreement, often used with continuous data rather than ranks.
Noun
-
a coefficient of agreement (concordance) between different sets of rank orderings of the same set of things
