ABSTRACT
Sewell Wright, English biometrician, first demonstrated the application of path analysis to biology by developing models for predicting the birth weight of guinea pigs, examining the relative importance of hereditary influence and environment, and studying human intelligence. Using the structural equation modeling (SEM) framework, one can easily fit models constructed within the path analysis tradition. This is because path analysis models can be viewed as special cases of structural equation models. The chapter provides information about the fit of the model, and presents the maximum values of the log-likelihood for the fitted model and saturated model. The fitted model and saturated model are closely related to the fit function values and will typically differ in empirical research that commonly deals with non-saturated models. The path coefficient estimates are essentially identical, within round-off or numerical error, to those obtained with EQS and LISREL.
