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Cronbach's alpha (Cronbach's ), also known as tau-equivalent reliability or coefficient alpha (coefficient ), is a reliability coefficient and a measure of the internal consistency of tests and measures. [1] [2] [3] It was named after the American psychologist Lee Cronbach.
Chance factors: luck in selection of answers by sheer guessing, momentary distractions; The goal of estimating reliability is to determine how much of the variability in test scores is due to measurement errors and how much is due to variability in true scores . [7] A true score is the replicable feature of the concept being measured. It is the ...
The standard errors are normally produced as a by-product of the estimation process. The separation index is typically very close in value to Cronbach's alpha. [28] IRT is sometimes called strong true score theory or modern mental test theory because it is a more recent body of theory and makes more explicit the hypotheses that are implicit ...
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"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." With 2025 approaching, you might be thinking about your New Year’s resolutions.Many of these goals ...
(The Center Square) – The Georgia Court of Appeals removed Fulton County District Attorney Fani Willis from prosecuting the election interference case against Donald J. Trump and others. The ...
Krippendorff's alpha coefficient, [1] named after academic Klaus Krippendorff, is a statistical measure of the agreement achieved when coding a set of units of analysis.. Since the 1970s, alpha has been used in content analysis where textual units are categorized by trained readers, in counseling and survey research where experts code open-ended interview data into analyzable terms, in ...
The New York Jets have once again been eliminated from the NFL playoff picture, pushing their league-worst drought to 14 seasons.