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hi there,
during my studies, i always dreamed of analyzing large dataset ... now, that i am put in front of one - i lost sight.
among others there are a lot of variables that are dichotomous (1 or 0) and i think, i should summarize them. hence i have read, that you cannot use a standard factor analysis as given in spss and better chose a factor analysis, that is based on a tetrachoric correlation, i first asked myself
1) where can i run my variables into an tetrachoric correlation (is it available in standard spss)?
2) how can i run a factor analysis after i have these tetrachoric correlations / so using them as the association critera (i mean, i do not have them as a variable, so i can not use them in other analysis)
and
3) when i factoranalyze the other variables (that are not dichotomou) can i use them together in succeeding analysis? (like clustering all respondents with the factors from the tetrachoric correlation and the other factors)
many thanks for any kind of recommendation or advice
stefan
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