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Research Problems2
Test Reliability2
Achievement Gains1
Correlation1
Higher Education1
Mathematical Formulas1
Pretests Posttests1
Sampling1
Statistical Analysis1
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Journal of Educational…2
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Callender, John C.1
Osburn, H. G.1
Williams, Richard H.1
Zimmerman, Donald W.1
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Gain Scores in Research Can Be Highly Reliable.
Peer reviewed Peer reviewed
Zimmerman, Donald W.; Williams, Richard H. – Journal of Educational Measurement, 1982
The reliability of differences between pretest and posttest measures with intervening experimental treatment can be highly reliable under some conditions. If the error components of pretest and posttest measures are correlated, the classical formula for the reliability of differences underestimates the actual reliability of gains. (Author/CM)
Descriptors: Achievement Gains, Correlation, Pretests Posttests, Research Problems
An Empirical Comparison of Coefficient Alpha, Guttman's Lambda-2, and MSPLIT Maximized Split-Half Reliability Estimates.
Peer reviewed Peer reviewed
Callender, John C.; Osburn, H. G. – Journal of Educational Measurement, 1979
Some procedures for estimating internal consistency reliability may be superior mathematically to the more commonly used methods such as Coefficient Alpha. One problem is computational difficulty; the other is the possibility of overestimation due to capitalization on chance. (Author/CTM)
Descriptors: Higher Education, Mathematical Formulas, Research Problems, Sampling