Testing Measurement Models for Factorial Invariance: A Systematic Approach

Comparing different groups (e.g., cultures, age cohorts) using survey-type instruments raises the question of factorial invariance, that is, whether or not members of different groups ascribe the same meanings to survey items. This article attempts to advance multi-group research by (a) providing a concise summary of the factorial invariance problem, (b) proposing a simplified notation intended to facilitate discussion of the problem, and (c) suggesting a structured approach for testing large models. This procedure is illustrated using an extended example. Two computer programs designed to make the recommended procedures less laborious are offered.