yao lu posted on Wednesday, February 22, 2012 - 3:24 pm
Hi, I have a question regarded using CFA on repeated measures within the same group. I have a causal model described as: F1 by x1, x2, x3 F2 by x4, x5, x6 F3 by x7, x8, x9
F4 by y1, y2, y3 F5 by y4, y4, y5 F6 by y6, y7, y8
F4 on F1 F5 on F2 F6 on F3
F1 and F4 are based on the repeated measures (e.g., x1 asks about the quality of product A, and x4 asks about the quality of product B). Similarly, F5 and F2, and F6 and F3 use repeated measures.
My question is that can I still conduct a CFA? My concern is that given repeated measures, the residual of each factor indicator needs to be correlated with that of the correspondent repeated indicator. For example, there are 9 residual correlations of factor indicators in this case. Would this cause too many complications in running and evaluating the model?
I am still at the study design stage, so do not have the actual date to run the test myself. I would highly appreciate your insight, and make appropriate changes to my study if necessary.