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Convergent Validity

Convergent Validity: In psychometrics , the convergent validity of a survey instrument or psychometric test indicates the degree of agreement between measurements of the same trait obtained by different approaches supposed to measure the same trait. The complementary concept is the divergent validity . Both are forms of the construct...

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Loss Function

A loss function specifies a penalty for an incorrect estimate from a statistical model. Typical loss functions might specify the penalty as a function of the difference between the estimate and the true value, or simply as a binary value depending on whether the estimate is accurate within a certain...

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