Research design and questionnaire have the effect of dependent and independent variable.
Absolutely, you have to be very careful what do you want to study and what factors may influence having in mind the demographics as well.
Try to start with a nice mind map of the situation, it helps.
thanks a lot Naveed sir and Hussin sir, if at all you have any information or notes on this please share it to me.
Definitly, it affects. How researcher design the questionnaire {content, organization, clarity, simplicity, directions, and method of data collection} all affect the validity and the outcome of the study.
Choosing the suitable instrument to measure the IV and DV is critical in research.
Not only the literature review will help you in reaching better decision, but try to ask colleagues and experts on the appropriate developent of the study questionnaire.
Definitely, questions should be suitability drafted keeping in mind the type of data or information that might influence the variables