We have created a questionnaire. In this questionnaire there are different dimensions with different answering scales.
Because of our rightly skewed data we log transformed our data. But here is the thing:
Because of the different answering scales (some are Likert 5, some Likert 7, and even a dichotomous scale) they have suggested to transform our data into z-scores. This would be applicable if the data wasn't log transformed, but is it usefull (possible) to transform the log transformed scores into z-scores?
P.s.) We eventually want to perform a Bivariate Correlation and Linear regression (with SPSS 16).