“…In fact, researchers and scholars have examined measurement invariance across gender (Eagle et al, 2001;Tang et al, in press), income level (Tang et al, 2002b), employment status (full-time versus part-time) (Tang, et al, 2002a), profession (Idaszak et al, 1988;Tang et al, 2002b), experimental treatments (Chan and Schmitt, 1997), sources of performance ratings (Maurer et al, 1998), and different time periods in longitudinal research (Epitropaki and Martin, 2004;Riordan et al, 2001). Due to different demographic variables (e.g.…”