1. Structure on means and covariances

2. GROWTH IN WISC SCORES McArdie and Epstein (1987) using data from R.T. Osborne and collaborators on the Wechsler Intelligence Scale for Children administered to 204 children at four times from about age 6 to 11.

3. Growth in Wisc Scores V1V4V3V2 V999 1 * 1 * * * * * * * *

4. EQS code /TITLE GROWTH IN WISC SCORES (EXAMPLE IN EQS MANUAL P. 175) OSBORNE DATA (MCARDLE & EPSTEIN, 1987, P.113) /SPECIFICATIONS CASES = 204; VAR = 4; ANALYSIS=MOMENT; MATRIX = CORRELATIONS; /EQUATIONS V1 = F1 + E1 - 3*V999; V2 = 1*F1 + E2; V3 = F2 + E3; V4 = 1*F2 + E4; F1 = 21*V999 + D1; F2 = 1*F1 + 8*V999 + D2; /VARIANCES D1 = 30*; D2 = 3*; E1 TO E3 = 8*; E4 = 16*; /TECHNICAL TOL=0.01; /PRINT EFFECT = YES; /MEANS 18.034 25.819 35.255 46.593 /STANDARD DEVIATIONS 6.374 7.319 7.796 10.386 /MATRIX 1.000.809 1.000.806.850 1.000.765.831.867 1.000 /END /STANDARD DEVIATIONS 6.374 7.319 7.796 10.386 /MATRIX 1.000.809 1.000.806.850 1.000.765.831.867 1.000 /END