Page 54 - Development of Questionnaires for Quantitative Medical Research

Toobert and Glasgow, 1994); which are widely

used for measuring latent variables.

The response to be elicited by this type of

questionnaire is usually measured by a Likert

scale. Such questionnaires are validated by using

exploratory factor analysis (EFA) which will

sometimes be followed by structural equation

modelling (SEM). Both are statistical techniques

to help researchers in dividing many items or

questions into several possible and logical

domains or factors. Such domains can later be

defined to represent a specific characteristic of the

population, and so the next chapter provides the