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Cronbach’s alpha

Cronbach’s alpha. assessing scale reliability. Cronbach's alpha is an index of reliability associated with the variation accounted for by the true score of the "underlying construct."

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Cronbach’s alpha

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  1. Cronbach’s alpha assessing scale reliability

  2. Cronbach's alpha is an index of reliability associated with the variation accounted for by the true score of the "underlying construct." Allows a researcher to measure the internal consistency of scale items, based on the average inter-item correlation Indicates the extent to which the items in your questionnaire are related to each other Indicates whether a scale is unidimensional or multidimensional Cronbach’s alpha

  3. Interpreting scale reliability • The higher the score, the more reliable the generated scale is • A score of .70 or greater is generally considered to be acceptable • .90 or > = high reliability • .80-.89 = good reliability • .70-79 = acceptable reliability • .65-.69 = marginal reliability • lower thresholds are sometimes used in the literature.

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