A 2. 5-yr. longitudinal study of the reading scales of the Stanford Achievement Test confirmed the redundancy in its subtests. Strong and stable test-retest reliability coefficients were evident and supported the use of the Stanford total reading scale for longitudinal evaluations.
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References
1.
KleinA. E.Further evidence of the redundancy of the Stanford Achievement Test. Educational and Psychological Measurement, 1979, 39, 1061–1065.