To determine the pilot sample size.is the pilot sample 5% or 10% from the total sample size? and may I have the references??
This depends on the type of the study, the estimated sample size, the availability of the participants. For example if your sample will reach 1,000 then 5% means 50 which is too much.
If you are talking about AIDS, you cant go for large pilot even if your sample is 80. considering that the sample in the pilot will be not be included in the main study.
Also, it is preferred to have the pilot sample with same characteristics of the study sample, however, sometimes, researchers may do pilot to check the clarity of the study questionnaire on subjects who are not relevant to the study.
This depends on the type of the study, the estimated sample size, the availability of the participants. For example if your sample will reach 1,000 then 5% means 50 which is too much.
If you are talking about AIDS, you cant go for large pilot even if your sample is 80. considering that the sample in the pilot will be not be included in the main study.
Also, it is preferred to have the pilot sample with same characteristics of the study sample, however, sometimes, researchers may do pilot to check the clarity of the study questionnaire on subjects who are not relevant to the study.
I do agree with Ahmad Sir. Further ,for reference , you can go through this research article.
Web link:http://www.sciencedirect.com/science/article/pii/S0895435615003030
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