A prepared list of written questions that can be completed face-to-face or in writing, over the phone or on the Internet
Open questions
Produce qualitative data as participants can answer them how they wish
Closed question
Produce quantitative data
Fixed range of possible answers
Evaluation
+Researcher get information from lots of people relatively quickly. This is because a questionnaire can be sent to many people. Generalisations can be easier to make
+Data is usually easier to analyse
-Respondents may not get truthful answers
-Questions may be unclear or misleading and the researcher isn't there to clarify the meaning, responses may lack validity