factor analysis on binary variables

[joe66]

Hi, I have seven dummy variables to measure patient's anxiety (1=Yes, 2= No) with around 1500 observations, and I would like to do scale construction using proc factor. But I know proc factor requires continuous data, how should I do with the seven dummy variables? Can anybody show me how to do that?

Thanks!

[StatDave]

See this note. You can search the SAS Notes and Samples and the list of Frequently-Asked for Statistics to find answers to many questions like this.

[Ksharp]

Using PROC DISTANCE to calculate the distance matrix and feed it into PROC FACTOR ?