I have a data set which includes a number of variables which need to be reverse coded. I have already completed my missing data analysis, however did not reverse code the items prior to replacing the missing data (using EM). I am also about to complete an exploratory factor analysis on the data, followed by a confirmatory factor analysis.
*** using SPSS
Two questions: 1) Should I have reverse coded all items prior to replacing the missing data? Will this have influenced which numbers were used to replace the missing data, and if reverse code items now will it be wrong?
2) Should I have reverse coded the items prior to the EFA and CFA? I have heard that it can be okay to leave the reverse coded items in EFA, as they will still load on the correct factors, but just be negatively loaded. However, wondering if this is correct/best practice?