A validation of the subjective vitality scale using structural equation modeling

Ryan and Frederick's (1997) measure of vitality, the subjective feeling of being alive and alert, was developed in the context of a single factor analysis. The present investigation employed structural equation modeling (SEM) to assess construct validity and utility of the new measure. A large sample (N = 526) was collected in two waves, allowing the investigators to further develop the model proposed by Ryan and Frederick, and to then validate it on a second data set. The final model is presented, and the process of achieving that model is discussed, as are the relative strengths of SEM in test development.