Raykov T
Multivariate Behav Res. 1997 Apr 1;32(2):95-104. doi: 10.1207/s15327906mbr3202_1.
This article is concerned with equivalent structural equation models that have been extended to multigroup models. It is shown that imposing cross-group equality constraints upon (a) no parameters or all parameters, or (b) any number of parameters in which the models are identical, preserves the model equivalence property. Alternatively, constraining for equality across groups some of those parameters in which the models differ can yield nonequivalent multiple-group models. The results are illustrated on two-group cognitive intervention data.
本文关注的是已扩展到多组模型的等效结构方程模型。结果表明，对（a）无参数或所有参数，或（b）模型相同的任意数量参数施加跨组相等约束，可保持模型等效性。另外，对模型不同的部分参数进行跨组相等约束会产生非等效的多组模型。这些结果在两组认知干预数据上得到了说明。
