cfa

  1. S

    Nested vs non-nested model?

    Hi all, I am running a confirmatory factor analysis and trying to work out if my two models are nested or not - this will be important for me to decide how I compare the models (e.g. using just the AIC and CFI statistics to compare the two models, or whether I can also use the chi-square...
  2. J

    AMOS - Confirmatory factor analysis - why the zero's on my error terms?

    Morning, I am trying to complete a confirmatory factor analysis in AMOS (255 subjects, 57 variables, 3 factors). I understand why AMOS automatically sets the regression weights of error terms to 1, however I am not sure what the zeros appearing above every error term are (a 0 with a small 1 to...
  3. V

    Help with understanding CFA...

    I hope someone can give me some pointers here... Or just point out to my muddled mind the porobably obvious things I am missing! I am running an online study where I have several statements that are worded to measure either A(say, attitude) or B(e.g. common sense), and these statements are...
  4. Z

    Extreme Modification index

    I am working on Confirmatory Factor Analysis in LISREL. Now, my first model reports an extremely high Modification Index (MI=2498,71) for one specific Lambda-X parameter. I decided NOT to free this parameter, but to free a parameter for associated measurement error between two items that...
  5. C

    SEM CFA results in error for longitudinal data

    I am trying to build a longitudinal measurement model of a "strategy construct" using SEM. As long as I am building the model for each year individually, I have no problem and Stata's SEM converges. I use the following code...
  6. H

    convergence not achieved in CFA

    Dear forum I am doing factor analysis on a small quality of life questionnaire. It contains only 6 items. I did EFA with parallel analysis in STATA. This revealed a possible 2 factor structure with 4 items in factor 1 and the last two items in factor 2. When I do CFA (SEM) to test this new...
  7. Lazar

    Bayes CFA

    Hi Folks, I have several questions about Bayes CFA in Open bugs that I hope you might be able to help me out with. First the setup: Here is a basic two factor CFA set up for the HS data that is available in several R packages ###Bugs CFA model 2 factors. All cross loadings zero###...
  8. J

    CFA and Factor scores from ordered Likert scale items using SEM and Lavaan packages.

    Hello! I'm trying to do some confirmatory factor analysis with for ordered Likert scale items using sem and lavaan packages. So far I have read a lot and searched a lot but working example has so far eluded me. Can someone please take a look at the data and tell me if what I'm doing is correct...
  9. R

    Confirmatory factor analysis: How to deal with non-normal data

    Hello, I have 12 manifest variables, none of which is normally distributed. As far as I know this makes my data unsuitable for a CFA with maximum likelihood estimation (?). I am not sure, however, which alternative estimation method should be used instead. Apart from practical advice I am...
  10. R

    [AMOS] No BIC value given

    I would like to test two different (and competing) CFA-models in AMOS. Both of the these used the same nine manifest variables. In one of them, there are four latent variables, in the other two. After doing some (admittedly not extremely thorough) research on model comparisons I had planned to...
  11. J

    CFA and SEM goodness fit indices the same?

    I am using AMOS to fit a structural equation model. Before doing so, however, I would like to perform a confirmatory factor analysis, which I have done this by correlating the latent variables. After confirming goodness of fit (using GFI, CFI, RMSEA, etc.), I run the structural model. However...
  12. L

    How to calculate Confidence Interval from correlation latent factors in CFA?

    If want to calculate the 95% CI of the interfactor correlations (correlations between latent factors) in a CFA, I believe I do this by multiplying the standard error by 1.96 and add/ subtract this from the correlation? However, AMOS only gives standard errors of the covariances, not of the...
  13. P

    Two CFA vs second-order CFA

    Hi All, I'm working on my dissertation, and am evaluating the internal structure of a 34-item scale. The model in which the scale is based off of is hierarchical, and is structured/ordered as such: (1st) items, (2nd) item-groups, & (3rd) sub-scales. To evaluate this information I would use a...
  14. T

    Longitudinal CFA / ESEM for factor extraction in ordinal data

    Our data has N=700 and 5 measurement points. We want to explore the factor structure of the questionnaire measuring the dependent variable. The questionnaire has 9 ordinal items (0-3), and both 1 and 2 factor solutions have been reported. I am using MPLUS because it can account for...
  15. M

    Testing for tau equivalence in a simple CFA model, based on correlation matrix

    For an assignment we are provided with only a (polychoric) correlation matrix. One of the questions concerns the different measurement models that can be tested (congeneric, tau equivalent, parallel). My understanding of the course material would lead me to believe that analysing a...
  16. S

    Confirmatory Factor Analysis: Appropriateness and interpretation

    Greetings, all! I am working on the statistics for my dissertation, and while it seems that confirmatory factor analysis fits my needs based on what I've read thus far, I am not quite sure how to run it and which software package I might need (I have heard good things about AMOS; my data is...