Five possible interpretations are given of very high correlations between scores on successively administered ability tests in a longitudinal sample of approximately 7,000 public school students tested in grades 5, 7, 9, and 11. At each of the four grades, students were given the appropriate level of the Sequential Test of Education Progress…

A longitudinal study of the academic growth of Negro and white students who attended the same high schools and were enrolled in the same curricula. (Author/CK)

To correct for measurement error in the correlation of student status with achievement gain, the simplex model was used. Results supported the authors' hypothesis that status and gain are correlated. Students who start out as low achievers may need more help over time to maintain the same academic growth as higher achievers. (Author/MV)