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IBM® SPSS® Amos™ 28

The following program shows how to obtain various fit measures for multiple models (i.e., when the Model method has been used more than once).

Imports System.Diagnostics
Module MainModule
    ' Df Method Example 2
    Sub Main()
        Dim Sem As New AmosEngineLib.AmosEngine
        Dim i As Integer
 
        Sem.BeginGroup(AmosEngine.AmosDir & "Examples\English\UserGuide.xls", "Grnt_fem")
        Sem.AStructure("visperc = (a) spatial + (1) err_v")
        Sem.AStructure("cubes = (b) spatial + (1) err_c")
        Sem.AStructure("lozenges = (c) spatial + (1) err_l")
        Sem.AStructure("paragraph = (d) verbal + (1) err_p")
        Sem.AStructure("sentence = (e) verbal + (1) err_s")
        Sem.AStructure("wordmean = (f) verbal + (1) err_w")
        Sem.Var("spatial", 1)
        Sem.Var("verbal", 1)
 
        Sem.Model("Congeneric")
        Sem.Model("tau-equivalent", "a = b = c", "d = e = f")
 
        For i = 1 To 2
            Debug.WriteLine("")
            Debug.WriteLine("Model number " & i)
            Sem.FitModel(i)
            Debug.WriteLine("Chi Square = " & Sem.Cmin)
            Debug.WriteLine("Degrees of Freedom = " & Sem.df)
            Debug.WriteLine("p = " & Sem.p)
            Debug.WriteLine("Number of parameters = " & Sem.npar)
            Debug.WriteLine("Noncentrality parameter = " & Sem.Ncp & " (" & _
                    Sem.NcpLo & ", " & Sem.NcpHi & ")")
            Debug.WriteLine("Rmsea = " & Sem.Rmsea & " (" & Sem.RmseaLo & ", " & Sem.RmseaHi & ")")
            Debug.WriteLine("Test of close fit, p = " & Sem.Pclose)
        Next
 
        Sem.Dispose()
    End Sub
End Module

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