XO = XT + XS + XR represents the pure score model.

Name: XO = XT + XS + XR represents the pure score model.
Brand: Quizplus
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Quizplus · Accepted Answer

The equation XO = XT + XS + XR does not represent the pure score model; it is a general formula for observed score, where XO is the observed score, XT is the true score, XS is the systematic error, and XR is the random error. The pure score model typically focuses on the relationship between observed score and true score without explicitly including error components.

XO = XT + XS + XR Represents the Pure