TY - JOUR AU - Smith, Jeffrey K. AB - Weber (1977) contends that the use of Rasch analysis, principal components analysis, and classical test analysis shows that an in strument designed to measure a "bilevel dimensionality" in proba bility achievement (Levin, 1975) in fact measures a single latent trait. This article questions that interpretation and the use of Rasch and classical analysis to establish unidimensionality. TI - On the Examination of Test Unidimensionality JF - Educational and Psychological Measurement DO - 10.1177/001316448004000410 DA - 1980-12-01 UR - https://www.deepdyve.com/lp/sage/on-the-examination-of-test-unidimensionality-G0cLlWp055 SP - 885 EP - 889 VL - 40 IS - 4 DP - DeepDyve ER -