I am looking for clarification on whether it is acceptable to treat ordinal values with an underlying order as continuous when extracting residuals and in exploratory factor analysis (EFA).
- Does taking the residuals from a linear regression make sense if the independent variable is ordinal (ie: 1,2,3,4,5,6,etc) but has an underlying order? Or, do I need to use a regression model specific to ordinal values?
- Is it possible to perform an EFA on a dataset that has both ordinal and continuous values in it by treating all values as continuous?
- If the latter is not advisable, is there a method that would allow me to complete my analysis (taking residuals, performing EFA) on a mixed dataset of continuous + ordinal variables?
Thanks in advance- any help much appreciated!