Peer reviewedERIC Number: EJ266464
Record Type: Journal
Publication Date: 1982
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Abstractor: N/A
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Available Date: N/A
Gain Scores in Research Can Be Highly Reliable.
Zimmerman, Donald W.; Williams, Richard H.
Journal of Educational Measurement, v19 n2 p149-54 Sum 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, Test Reliability
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
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Language: English
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