Anderson, T. W. (1963). The use of factor analysis in the statistical analysis of multiple time series,*Psychometrika, 28*, 1–25.

Bentler, P. M. (1989).*EQS structural equations program manual*. Los Angeles: BMDP Statistical Software.

Bock, R. D., & Thissen, D. (1980). Statistical problems of fitting individual growth curves. In F. E. Johnston, A. F. Roche & C. Susanne (Eds.),*Human physical growth and maturation: Methodologies and factors* (pp. 265–290). New York: Plenum Press.

Graybill, F. A. (1969).*Introduction to matrices with applications in statistics*. Belmont, CA: Wadsworth.

Jöreskog, K. G. (1970). Estimation and testing of simplex models.*British Journal of Mathematical and Statistical Psychology, 23*, 121–145.

Jöreskog, K. G., & Sörbom, D. (1989).*LISREL 7 user's reference guide*. Mooresville, IN: Scientific Software.

Jöreskog, K. G., & Sörbom, D. (1985). Simultaneous analysis of longitudinal data from several cohorts. In W. M. Mason & S. E. Fienberg (Eds.),*Cohort analysis in social research* (pp. 323–341). New York: Springer-Verlag.

Lord, F. M., & Novick, M. R. (1968).*Statistical theories of mental test scores*. Menlo Park, CA: Addison-Wesley.

Maritz, J. (1970).*Empirical Bayes methods*. London: Methuen.

McDonald, R. P. (1978). A simple comprehensive model for the analysis of covariance structures.*British Journal of Mathematical and Statistical Psychology, 31*, 59–72.

Nesselroade, J. R., & Baltes, P. B. (1974). Adolescent personality development and historical change: 1970–1972.*Monographs of the Society for Research in Child Development, 39* (1, Serial No. 154).

Ramsay, J. O. (1982). When the data are functions.*Psychometrika, 47*, 379–396.

Rao, C. R. (1958). Some statistical methods for comparison of growth curves.*Biometrics, 14*, 1–17.

Rogosa, D. R., Brandt, D., & Zimowski, M. (1982). A growth curve approach to the measurment of change.*Psychological Bulletin, 90*, 726–748.

Rogosa, D. R., & Willett, J. B. (1985a). Understanding correlates of change by modeling individual differences in growth.*Psychometrika, 50*, 203–228.

Rogosa, D. R., & Willett, J. B. (1985b). Satisfying a simplex structure is simpler than it should be.*Journal of Educational Statistics, 10*, 99–107.

Schaie, K. W. (1965). A general model for the study of developmental problems.*Psychological Bulletin, 64*, 92–107.

Scher, A. M., Young, A. C., & Meredith, W. M. (1960). Factor analysis of the electrocardiograph.*Circulation Research, 8*, 519–526.

Schumaker, L. L. (1981).*Spline functions: Basic theory*. New York: John Wiley & Sons.

Smith, P. L. (1979). Splines as a useful and convenient statistical tool.*American Statistician, 33*, 57–62.

Thurstone, L. L., & Thurstone, T. G. (1962).*SRA Primary Mental Abilities*. Chicago: Science Research Associates.

Tucker, L. R. (1958). Determination of parameters of a functional relation by factor analysis.*Psychometrika, 23*, 19–23.

Tucker, L. R. (1966). Learning theory and multivariate experiment: Illustration of generalized learning curves. In R. B. Cattell (Ed.),*Handbook of multivariate experimental psychology* (pp. 476–501). Chicago: Rand McNally.

Vinsonhaler, J. F., & Meredith, W. (1966). A stochastic model for repeated testing.*Multivariate Behavioral Research, 1*, 461–477.