A list of questions filled in by the
sample (self completion) made up of
mostly closed questions, but can
sometimes have open questions,
they mostly give quantitative data
Postal questionnaires
Easy to make anonymous, so
people will be more likely to be
honest, especially about
sensitive topics
Can access a
geographically wide
sample and a variety of
people
Expensive - have to pay to post it, and to get a
higher response rate, could offer an incentive
e.g. prize draw, but it makes it even more
expensive
Low response rates, if people
cannot be bothered to fill them
in and send them back
Leading questions
When questions are
worded in a way that
encourages a certain
answer
Evidence of researcher bias e.g
the researcher's own views are
affecting the answer
Strengths and weaknesses
Mostly closed questions
Each member of sample answering identical questions
Therefore high in reliability (easy to repeat)
Can be used to access a large sample
Easier to make sample representative
Respondents prevented from
answering in their own words when
closed questions are used
Therefore reduces validity
If only certain types of people in
sample return questionnaire