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Direct linkTenko Raykov; George A. Marcoulides; Natalja Menold – Applied Measurement in Education, 2024
We discuss an application of Bayesian factor analysis for estimation of the optimal linear combination and associated maximal reliability of a multi-component measuring instrument. The described procedure yields point and credibility interval estimates of this reliability coefficient, which are readily obtained in educational and behavioral…
Descriptors: Bayesian Statistics, Test Reliability, Error of Measurement, Measurement Equipment
Xiao, 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
van Alphen, Thijmen; Jak, Suzanne; Jansen in de Wal, Joost; Schuitema, Jaap; Peetsma, Thea – Applied Measurement in Education, 2022
Intensive longitudinal data is increasingly used to study state-like processes such as changes in daily stress. Measures aimed at collecting such data require the same level of scrutiny regarding scale reliability as traditional questionnaires. The most prevalent methods used to assess reliability of intensive longitudinal measures are based on…
Descriptors: Test Reliability, Measures (Individuals), Anxiety, Data Collection
Almehrizi, Rashid S. – Applied Measurement in Education, 2021
KR-21 reliability and its extension (coefficient [alpha]) gives the reliability estimate of test scores under the assumption of tau-equivalent forms. KR-21 reliability gives the reliability estimate for summed scores for dichotomous items when items are randomly sampled from an infinite pool of similar items (randomly parallel forms). The article…
Descriptors: Test Reliability, Scores, Scoring, Computation
