problems with questionnaires
why use questionnaires
Preparing questionnaires: keep them short
people will lose interest and not complete them
10 questions max
Preparing questionnaires: pilot studies
look at questions people don’t want to answer and change them to make sure you’re not missing out on important issues
Preparing questionnaires: repetition
don’t repeat questions that can be answered elsewhere
Preparing questionnaires: leading questions
want to avoid biased answers
Preparing questionnaires: sample size
(50-200) and sample method should be stratified