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…

The relationships among teaching, testing, and learning are examined and reconceptualized based on different theories and computer adaptive testing. Approaches that integrate teaching, testing, and learning include: (1) behavioral psychology; (2) cognitive psychology; and (3) computer adaptive testing (CAT). Some behaviorists have assumed that all…

During a three-year project (1977-1980) on computerized adaptive achievement testing, item characteristic curve theory (ICC) and adaptive testing strategies designed almost exclusively for ability testing were applied to achievement testing. Adaptive techniques substantially reduced test length without reducing quality, when applied to three…