Second, reliability is a necessary characteristic of a valid self-report measure, but it is not sufficient to ensure the validity of questions.
We evaluated the validity of questions designed to identify lifetime and active epilepsy, medication use, and seizure occurrence on population-based surveys.
The purpose of this project was to examine the validity of questions in the authors' Lifetime Tobacco Use Questionnaire (LTUQ).
Additionally, the construct validity of questions related to contacts with psychotherapist and long-term absence from work was satisfactory.
Prior to data collection, the Swahili version of questionnaire was pretested at a different (other then study areas) location to test the validity of questions and the translation.
An initial evaluation of the validity of questions selected from a more extensive questionnaire used in a pilot study of the EPIC protocol that resembled questions interrogated by the short EPIC-PAQ was performed in the Netherlands [ 9].
Furthermore, the validity of questions used to identify personal problems that were annoying or stressful in life is not known, and indeed, some questions in the official MHLW survey were somewhat imprecise.
We suggest that in using an instrument such as TARS, continued work on ensuring face validity of questions at the level of the participants within the local setting of use is required.
The self-reported risk factors are subject to issues of the cross-cultural validity of questions, although this should be less of a problem in comparison within ethnic groups across time rather than between ethnic groups.
Studies of the reproducibility and validity of questions about HC use have been carried out by others (Coulter et al, 1986; Nischan et al, 1993; Hunter et al, 1997).
