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Direct linkXiao, Leifeng; Hau, Kit-Tai – Applied Measurement in Education, 2023
We compared coefficient alpha with five alternatives (omega total, omega RT, omega h, GLB, and coefficient H) in two simulation studies. Results showed for unidimensional scales, (a) all indices except omega h performed similarly well for most conditions; (b) alpha is still good; (c) GLB and coefficient H overestimated reliability with small…
Descriptors: Test Theory, Test Reliability, Factor Analysis, Test Length
Wan, Lei; Henly, George A. – Applied Measurement in Education, 2012
Many innovative item formats have been proposed over the past decade, but little empirical research has been conducted on their measurement properties. This study examines the reliability, efficiency, and construct validity of two innovative item formats--the figural response (FR) and constructed response (CR) formats used in a K-12 computerized…
Descriptors: Test Items, Test Format, Computer Assisted Testing, Measurement
