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SPSS AMOS allows the specification of a variable as ordered categorical. For example, 1) level of proficiency (PROFICIENCY: 0 = low, 1 = high), 2) social-economic status (SES: 1 = low, 2 = intermediate, and 3 = high). In AMOS, Tools/Data Recode is the where this specification happens. After moving the name of a variable to the box of "New and recoded variables" and select "Ordered-categorical" under the "Recoding rule" drop-down menu, the specification (a.k.a., data recoding) is completed. Next, if the user clicks the Details button, a new window pops up where the categories of the newly specified/recoded variable show up together with their boundary value(s). For the binary PROFICIENCY variable, there is only one boundary and its value is automatically 0. For the three-category SES variable, there are two boundaries which are automatically 0 and 1, respectively. Finally, let's also assume the two variables, PROFICIENCY and SES, both serve as endogenous variables (i.e., dependent variables) in the model. Such a model will need Bayesian estimation in AMOS.
My questions are related to these boundary/boundaries and their value(s).
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