ERIC Number: EJ292476
Record Type: CIJE
Publication Date: 1983
Reference Count: 0
The Mathematical Definition of Test Validity.
Zimmerman, Donald W.
Educational and Psychological Measurement, v43 n3 p791-96 Aut 1983
A definition of test validity as the ratio of a covariance term to a variance term, analogous to the classical definition of test reliability, is proposed. When error scores on distinct tests are uncorrelated, the proposed definition coincides with the usual one, but it remains meaningful when error scores are correlated. (Author/BW)
Publication Type: Reports - Research; Journal Articles
Education Level: N/A
Authoring Institution: N/A