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ACOVS. A General Computer Program for Analysis of Covariance Structures NICHD ANCOVA

Gruvaeus, Gunnar T.; Joreskog, Karl G.; Van Thillo, Marielle
Publication Year:
Report Number:
ETS Research Bulletin
Document Type:
Page Count:
Subject/Key Words:
National Institute for Child Health and Human Development (NICHD), Analysis of Covariance (ANCOVA), Computer Software, Mathematical Formulas


A computer program for analyzing information according to a general model for covariance structures is described. The model is useful to various areas and many problems. The input data may be a correlation matrix, a correlation matrix with standard deviations, or a dispersion matrix. How fixed, free, and constrained parameters are specified is discussed. The program is written in FORTRAN IV-G and has been tested on the IBM 360/65. A copy of the program may be obtained upon written request. The user must provide a tape. Although the program has been working well, no claim is made that it is error-free. No warranty is given as to the accuracy and functions of the program. Input data are listed. The output consists of printed and punched tapes. (SGK)

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