Does gender-specific differential item functioning affect the structure in vocational interest inventories?

The study investigates consequences of eliminating items showing gender-specific differential item functioning (DIF) on the psychometric structure of a standard RIASEC interest inventory. Holland’s hexagonal model was tested for structural invariance using a confirmatory methodological approach (confirmatory factor analysis and randomization tests of hypothesized order relations). Results suggest that eliminating items showing gender-specific DIF had no considerable influence on the instrument’s psychometric structure. Considering DIF as one possibility to improve test fairness when developing interest inventories is discussed.