Inter-rater reliability
Inter-rater reliability
Inter-rater reliability (pronounced: /ˌɪntərˈreɪtər rɪˌlaɪəˈbɪlɪti/) is a statistical measure used to determine the level of agreement or consistency between two or more raters (also known as coders or observers) in their respective appraisals or ratings of a given phenomenon.
Etymology
The term "Inter-rater reliability" is derived from the English words "inter-", a prefix meaning "between", "rater", a noun referring to a person who rates or assesses something, and "reliability", a noun referring to the consistency of a measure.
Definition
Inter-rater reliability is used in research and various fields such as psychology, sociology, medicine, and education to ensure that the data collected is reliable, and not due to the subjective or inconsistent judgments of the raters. It is a crucial aspect of research design and is often used in studies that involve qualitative research methods.
Calculation
There are several statistical methods used to calculate inter-rater reliability. Some of the most common include the Cohen's Kappa, Fleiss' Kappa, and the Intraclass correlation coefficient. Each of these methods takes into account the possibility of agreement occurring by chance, providing a more accurate measure of rater agreement.
Related Terms
- Intra-rater reliability: This refers to the degree of agreement among repeated administrations of a diagnostic test performed by a single rater.
- Test-retest reliability: This is a measure of reliability obtained by administering the same test twice over a period of time to a group of individuals.
- Parallel forms reliability: This involves administering different versions of an assessment tool (both versions must contain items that probe the same construct, skill, knowledge base, etc.) to the same group of individuals.
External links
- Medical encyclopedia article on Inter-rater reliability
- Wikipedia's article - Inter-rater reliability
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