I would suggest using fewer questions to minimize selection effects.
What kind of selection effects do you mean? That not enough people would want to invest the time to answer 200 questions?
And that willingness to invest such time might correlate with certain factors.
I would suggest using fewer questions to minimize selection effects.
What kind of selection effects do you mean? That not enough people would want to invest the time to answer 200 questions?
And that willingness to invest such time might correlate with certain factors.