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Example 16
The following path diagram is Model A for the experimental group:
Means and intercepts are an important part of this model, so be sure that you do the
following:
E From the menus, choose View > Analysis Properties.
E Click the Estimation tab.
E Select Estimate means and intercepts (a check mark appears next to it).
In each group, Model A specifies that pre_syn and pre_opp are indicators of a single
latent variable called pre_verbal, and that post_syn and post_opp are indicators of
another latent variable called post_verbal. The latent variable pre_verbal is interpreted
0,
pre_verbal
a_syn1
pre_syn
0,
eps1
1
1
a_opp1
pre_opp
0,
eps2
opp_v1
1
0
post_verbal
a_syn2
post_syn
0,
eps3
a_opp2
post_opp
0,
eps4
1
1
opp_v2
1
0,
zeta
1
Example 16: Model A
An alternative to ANCOVA
Olsson (1973): control condition.
Model Specification
pre_diff,
pre_verbal
a_syn1
pre_syn
0,
eps1
1
1
a_opp1
pre_opp
0,
eps2
opp_v1
1
effect
post_verbal
a_syn2
post_syn
0,
eps3
a_opp2
post_opp
0,
eps4
1
1
opp_v2
1
0,
zeta
1
Example 16: Model A
An alternative to ANCOVA
Olsson (1973): experimental condition.
Model Specification