When we work with multi-item measures multi-item measures, we often estimate internal consistency reliability can be defined as “a reliability estimate based on intercorrelation (i.e., homogeneity) among items on a test, with [Cronbach’s] alpha being a prime example” (Schultz and Whitney 2005). In other words, internal consistency reliability tells us how consistent scores on different items (e.g., questions) are to one another. Cronbach’s alpha is commonly used as an indicator of internal consistency reliability.
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