It could be adapted from an already tested one or could be developed as a new data tool specific to measure or quantify a particular attribute.
These conditions therefore warrant the need to test validity and reliability of questionnaire.
Specifically, raters will review all of the questionnaire items for readability, clarity and comprehensiveness and come to some level of agreement as to which items should be included in the final questionnaire.
proposed a S-CVI of ≥0.78 as significant level for inclusion of an item into the study.
Validity of a questionnaire can be established using a panel of experts which explore theoretical construct as shown in [Figure 2].
This form of validity exploits how well the idea of a theoretical construct is represented in an operational measure (questionnaire).
Keywords: Questionnaire, reliability, social and health, validity How to cite this URL: Bolarinwa OA.
Principles and methods of validity and reliability testing of questionnaires used in social and health science researches.
This article therefore sets out to review the principles and methods of validity and reliability measurement tools used in social and health science researches.
To achieve the stated goal, the author reviewed currents articles (both print and online), scientific textbooks, lecture notes/presentations and health programme papers.
The Fog Index, Flesch Reading Ease, Flesch-Kincaid readability formula and Gunning-Fog Index are formulas that have also been used to determine readability in validity.
Major drawback of content validity is that it is also adjudged to be highly subjective like face validity.
This is called a translational or representational validity.