How to validate a questionnaire?
http://pediatricthesis.blogspot.com/2018/
[12/05, 10:25 PM] Santosh Kondekar: How many questions are there
And how many components are there for the questionaire
What kind of answer patterns these questions have
R u planning a scoring system too
[12/05, 10:50 PM] Santosh Kondekar: In simple words
If its a serious questionaire study u need to do component validation, so that further study doesnt go waste. Each component and pattern of questions and or score needs to b derived without ambiguous results and avoiding bias and errors of random filling of questionnaire.
If there is yes no question it becomes single question, if it has many options it becomes many questions... Like a mcq.
Unless we confirm the questionaire is sound for a random accessor by doing some pilot filling and analysing result and modify as per needs felt in that pilot study, there will b plenty of revisions in it.
So only when the questionare iw completely sound as per u, u can subject it for validation. Simplest methodfor validation is called Heuristic method or face validation by which u get ur question Aire approved and corrected and okayed by 5-10 different people or specialist working in same field. Each person validating is supposed to check components construct and biases
[12/05, 10:50 PM] Santosh Kondekar: After its validated .. the questionaire is considered primary validated.
[12/05, 10:50 PM] Santosh Kondekar: https://www.statsdirect.com/help/basics/validity.htm also read this
[12/05, 10:52 PM] Santosh Kondekar: Depending on prevalence decided sample size, the questionare is then applied to the given population and quantitative results of study are analysed as per assumptions of aims n objectives for different components. When assumptions turn true by stats tests, its considered externally validated.
And how many components are there for the questionaire
What kind of answer patterns these questions have
R u planning a scoring system too
[12/05, 10:50 PM] Santosh Kondekar: In simple words
If its a serious questionaire study u need to do component validation, so that further study doesnt go waste. Each component and pattern of questions and or score needs to b derived without ambiguous results and avoiding bias and errors of random filling of questionnaire.
If there is yes no question it becomes single question, if it has many options it becomes many questions... Like a mcq.
Unless we confirm the questionaire is sound for a random accessor by doing some pilot filling and analysing result and modify as per needs felt in that pilot study, there will b plenty of revisions in it.
So only when the questionare iw completely sound as per u, u can subject it for validation. Simplest methodfor validation is called Heuristic method or face validation by which u get ur question Aire approved and corrected and okayed by 5-10 different people or specialist working in same field. Each person validating is supposed to check components construct and biases
[12/05, 10:50 PM] Santosh Kondekar: After its validated .. the questionaire is considered primary validated.
[12/05, 10:50 PM] Santosh Kondekar: https://www.statsdirect.com/help/basics/validity.htm also read this
[12/05, 10:52 PM] Santosh Kondekar: Depending on prevalence decided sample size, the questionare is then applied to the given population and quantitative results of study are analysed as per assumptions of aims n objectives for different components. When assumptions turn true by stats tests, its considered externally validated.
