6 Written questions
6 Multiple choice questions
-does it represent the true value of the attribute being measured?
-validity of instrument compared with gold standard
- -part of reliability assessment
-intra (same data, dif time) or inter (same measurement, dif ppl/tool)
- -Construct Validity
-questionnaire standardisation/validation (qualitative research)
- -face validity
- does the questionnaire represent what is being studied?
5 True/False questions
coefficient of variation → estimates the amount of error in the measurement as a percentage of the mean
intra → same tool/observer
inter → different tool/person measuring the same thing
-has the largest variability
Criterion Validity → does the questionnaire represent what is being studied?
sampling validity → does the questionnaire represent what is being studied?