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Example 6
Multiple Models in a Single Analysis
Amos allows for the fitting of multiple models in a single analysis. This allows Amos
to summarize the results for all models in a single table. It also allows Amos to perform
a chi-square test for nested model comparisons. In this example, Models A, B, and C
can be fitted in a single analysis by noting that Models A and C can each be obtained
by constraining the parameters of Model B.
In the following path diagram from the file Ex06-all.amw, parameters of Model B
that need to be constrained to yield Model A or Model C have been assigned names:
Seven parameters in this path diagram are named: var_a67, var_p67, var_a71,
var_p71, b_pow67, b_pow71, and cov1. The naming of the parameters does not
constrain any of the parameters to be equal to each other because no two parameters
were given the same name. However, having names for the variables allows
constraining them in various ways, as will now be demonstrated.
anomia67 powles67 anomia71 powles71
educatio SEI
67
alienation
71
alienation
var_a67
eps1
var_p67
eps2
var_a71
eps3
var_p71
eps4
ses
delta2
delta1
1 1 1 1
b_pow711
b_pow67
1
1
1
zeta2 zeta1
1 1
1
Example 6: Most General Model
Exploratory Analysis
Wheaton (1977)
Model Specification
cov1