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Hello, It has been found that SEM analysis using polychoric correlations + maximum likelihood estimator produces incorrect test statistics and standard errors (e.g., Flora, D. B., & Curran, P. J. (2004). An Empirical Evaluation of Alternative Methods of Estimation for Con...
Hello, I am running polychoric correlations on a dataset composed of 12 ordinal and binary variables (N =384), using the polycor package. One of the association (between 2 dichotomous variables) is very high using the 2-step estimate (0.933...
Dear John and Stas, Thanks so much for your help. John, I did the correlation on the complete dataset (no missing values). I tried what you suggested and you were right: hetcor with pd=FALSE gives me the same result...
Thank you so much for all your answers! And sorry for being scarce on the details. My dataset has 12 variables (6 ordinal coded from 1 to 5, and 6 binary) and 384 cases without missing value. High values mean...
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