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Help with SEM model fit in AMOS

  • 1.  Help with SEM model fit in AMOS

    Posted Mon March 01, 2021 06:22 PM

    Hi,

    I am trying to make an SEM model in AMOS for my dissertation but having some trouble with getting a good fit. I am looking for relationships between self-efficacy reported on a Likert scale and scores on an assessment (the 2 instruments in my study). The Items on the left are the items from the self-efficacy questionnaire, and the skills listed on the right are scores on different categories in the test. I have done Pearsons r product moment correlations and the covariances I made were the significant results from the persons r. However, when I set the model up in AMOS and run it, the values I get do not meet the good fit indexes :(

    Here is what I get: Chi-square = 354.624, Df = 18, Probability level = .000, CFI = .064, TLI rho2 = -.456, RMSEA = .289

    When I tried to use the modification indices, it suggested adding covariances between the items on the self-efficacy scale and between the categories of scores on the assessment component. 

    I tried it out with the suggested covariances and I get: Chi-square = 5.223, Df= 6, Probability level = .516, CFI = 1.00, TLI rho2 = 1.010, RMSEA = .000

    Would that be considered a good fit? Can I still use that model even though my research question is to examine the relationships between the two instruments and not between the items within each instrument?

    I've added the models below for reference, Any help will be greatly appreciated!!



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    Faryal Shaukat
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