“…In addition, a variety of systematic biases are evident: age effects and ''halo'' effects have been reported (e.g., Murphy & Balzer, 1986). Subjects' height (Judge & Cable, 2004); facial attractiveness (Hosoda, StoneRomero, & Coats, 2003); and unconscious ethnic bias (Berry, Clark, & McClure, 2011;Jencks, 1998;Stauffer & Buckley, 2005), have all been shown to influence supervisor ratings of work performance. In describing the difficulties, in his own experience, of seeking objective supervisor ratings across a wide range of jobs, Guion (2006) says, ''Perhaps, indeed, we should abandon the pretence about 'objective', 'true', or 'hard' criteria of proficiency in performance' ' (pp.…”