A Simplex Model for Analyzing Academic Growth.

Werts, C. E.; And Others

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Peer reviewed

ERIC Number: EJ174789

Record Type: CIJE

Publication Date: 1977

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A Simplex Model for Analyzing Academic Growth

Werts, C. E.; And Others

Educational and Psychological Measurement, 37, 3, 745-56, Aut 77

A simplex model is presented for the analysis of longitudinal academic growth variables in which only one measure is obtained at each time. When this model fits the observed data, then reliabilities and unattenuated correlations can be estimated except for the first and last periods. (Author)

Descriptors: Academic Achievement, Achievement Gains, Achievement Tests, Elementary Secondary Education, Growth Patterns, Longitudinal Studies, Mathematical Models, Statistical Analysis, Test Interpretation

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