References
- Browne, M. W., & Cudeck, R. (1993). Alternative ways of assessing model fit. In K. A. Bollen & J. S. Long (Eds.), Testing structural equation models (pp. 136–162). Sage Publications.
- Jöreskog, K. G. (2020, June). Classical models for twin data. Structural Equation Modeling: A Multidisciplinary Journal, 28, 121–126. Published Open Access. https//doi.org/10.1080/10705511.2020.1789465.
- Neale, C. M., & Cardon, L. R. (1992). Methodology for genetic studies of twins and families. Kluwer Academic Publishers.
- Olsson, U. (1979). Maximum likelihood estimation of the polychoric correlation coefficient. Psychometrika, 44, 443–460. https://doi.org/10.1007/BF02296207