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Simultaneous Analysis of Several Groups
Conventions for Specifying Group Differences
The main purpose of a multigroup analysis is to find out the extent to which groups
differ. Do the groups all have the same path diagram with the same parameter values?
Do the groups have the same path diagram but with different parameter values for
different groups? Does each group need a different path diagram? Amos Graphics has
the following conventions for specifying group differences in a multigroup analysis:
All groups have the same path diagram unless explicitly declared otherwise.
Unnamed parameters are permitted to have different values in different groups.
Thus, the default multigroup model under Amos Graphics uses the same path
diagram for all groups but allows different parameter values for different groups.
Parameters in different groups can be constrained to the same value by giving them
the same label. (This will be demonstrated in Model B on p. 172.)
Specifying Model A
E From the menus, choose File > New to start a new path diagram.
E From the menus, choose File > Data Files.
Notice that the Data Files dialog box allows you to specify a data file for only a single
group called
Group number 1. We have not yet told the program that this is a multigroup
analysis.