I have 48 items in my questionnaire that represent 8 constructs. After conducting an exploratory factor analysis (EFA) with a principal components extraction method and Varimax rotation method, 8 sets of factor scores (FAC_1 to 8) were computed and saved using the regression method.
I've read in academic papers that those factor scores can be used as variables in regression analysis, but the problem is when I do so, the regression test yields no result! (I receive only 0 values!).
Alternatively I computed the mean score of the items representing each construct (resulting in 8 new variables) and used them in the regression test. This method worked, but i'm not sure if it's a correct procedure or not.
- Why am I getting zero-values for regression coefficients when I use factor saved scores and meaningful regression coefficients when I use computed mean scores?
- Can the mean scores of each construct instead of its factor scores generated through EFA be used in multiple regression analysis?