Coefficient alpha measures internal consistency reliability.

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Coefficient alpha, also known as Cronbach's alpha, is a statistic that measures how closely related a set of items are as a group. It is commonly used as a measure of internal consistency reliability in research, indicating how well a scale or test measures a single construct or concept. High alpha values (typically above .70) suggest that the items are strongly correlated and measure the same underlying construct, while lower alpha values may indicate that the items are less consistent or do not measure the same construct.

Coefficient Alpha Measures Internal Consistency Reliability