Factor analysis is commonly used in the fields of psychology and education6 and is
considered the method of choice for interpreting self-reporting questionnaires.7 Factor
analysis is a multivariate statistical procedure that has many uses,8-11 three of which will be
briefly noted here. Firstly, factor analysis reduces a large number of variables into a smaller
set of variables (also referred to as factors). Secondly, it establishes underlying dimensions
between measured variables and latent constructs, thereby allowing the formation and
refinement of theory. Thirdly, it provides construct validity evidence of self-reporting scales.
Nunnally (1978), cited by Thompson11, p.5 adds,