PPT
Get a Relatively Good Model
Construct a Model in Amos
Don't try to memorize the process. It's pointless:
Model Fit
Metrics:
CMIN --- CMIN/DF: < 3 (good); < 5 (OK)
CMIN --- P: > .05
RMR,GFI --- GFI: >.95
RMR,GFI --- AGFI: >.80
Baseline Comparison --- CFI: >.95 (good); > .90 (OK); > .80 (barely OK)
Parsimony-Adjusted Measure --- PCFI: >.80
RMSEA --- RMSEA: <.05 (good); >.05 && <.10 (OK); >.10 (barely OK)
RMSEA --- PCLOSE: >.05
CMIN/DF and P-value together tell you whether you model has a good fit; if the result is not within the range of metrics while you have a big number of sample, it is OK.
Modification
Remove some variables with low loadings.
Go to Modification Indices >>> Covariances and look for big number of M.I. between each pair of errors. Covariate ONLY those pair of errors on the same factor.
Go to Estimates >>> Matrices >>> Standard Residue Covariances and look for big numbers above or close to 2.58. Remove the variable that causes problems.
Model Test
Validity and Reliability
Metrics (for every factor):
CR > .70
AVE > .50
MSV < AVE
ASV < AVE
If you have convergent validity issues, then your variables do not correlate well with each other within their parent factor. Stop using CFA.
Optional Tests
- Common Method Bias
- Measurement Model Invariance
For more information, please see Dr. Gaskin's website.