When Can Subscores Have Value?
Haberman, Shelby J.
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ETS Research Report
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In educational tests, subscores are often generated from a portion of the items in a larger
test. Guidelines based on mean-squared error are proposed to indicate whether subscores
are worth reporting. Alternatives considered are direct reports of subscores, estimates of
subscores based on total score, combined estimates based on subscores and total scores, and
residual analysis of subscore. Applications are made to data from two testing programs.