Very interesting question, Sara.
I will alert Chris Foster – Head of Student Research at Oakham School with responsibility for EPQ’s – to your question. He is also in the process of finishing off his PhD, which relied heavily on questionnaires, so he should have some thoughts on questionnaire design 🙂
I will also mention it Jenny Toerien – Curriculum Librarian for Upper School at Oakham School – as she is a Mathematics graduate and has been of enormous help to me in this regard.
I will also flag your question with the community more widely.
Darryl