Questionnaire

Question 1

Questionnaires

DONT ASK

Why

Answer 1

Age (use categories)
Name
Address
Income

Unimportant/sensitive

Question 2

Questionnaires

AVOID

Answer 2

Leading questions 
Double questions
Too few (not representative)
Too many (unrealistic)
Friends/same age (must vary)
Getting cross/offended

Question 3

Questionnaires

DO

Answer 3

Closed questions (relative and easy to analyse)

10-15 questions (not too long)

Clear layout

Tally system (quick/easy)

Pilot survey (test for DONTs)

Intro self (where, what doing)

Look interested