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Direct linkTopping, K. J.; Samuels, J.; Paul, T. – School Effectiveness and School Improvement, 2007
This study elaborates the "what works?" question by exploring the effects of variability in program implementation quality on achievement. Particularly, the effects on achievement of computerized assessment of reading were investigated, analyzing data on 51,000 students in Grades 1-12 who read over 3 million books. When minimum implementation…
Descriptors: Program Implementation, Achievement Gains, Reading Achievement, Independent Reading
Whitney, Douglas R.; And Others – 1985
This research brief summarizes the available reliability and validity data available in, but spread throughout, a number of General Educational Development (GED) Testing Service publications. A section on reliability discusses how to determine reliability of a test's scores and two ways of assessing the reliability of a test--internal consistency…
Descriptors: Adult Education, High School Equivalency Programs, Item Analysis, Scores
