You might want to learn more about the general impression the candidate has left in previous jobs. The "General Impression" question lets you do just that! Reference givers answer this question with text so that they can tell you everything you need to know.

This is how the general impression question looks like for the reference giver:

This is how the general impression question looks like for the candidate:

If you are looking for a more structured answering format have a look at the work style question!