1. Introduction
Questionnaires are frequently used to collect information about opinions, attitudes, and behaviours in research. Whilst they are an extremely good way to collect data, a poorly worded questionnaire can hinder the participants' understanding of the questions being asked. This results in failure to provide accurate and valid data that answers the research question. Therefore, it is crucial to undertake procedures to check the validity and reliability of any questionnaire that you use for your research.
If you design a questionnaire specifically for your study or adapt an existing questionnaire, then you must ensure that it is validated. If you use an existing questionnaire, then you should review and check the validation processes that it underwent and the outcomes of those processes.
In this resource, we will explore in detail the concepts and procedures that can be used to examine your questionnaire and ensure that it is fit for the research you want to undertake.
