“Halo” and “horn” effects: These errors involve the tendency to allow one good (halo)
or bad (horn) characteristic of an applicant or qualification influence the evaluation of all
other qualifications. Board members need to monitor themselves when they are so
impressed by an applicant on one qualification so that they do not attribute positive
qualities for all other criteria regardless of the evidence provided. Conversely, when an
applicant does poorly in one area, they may be under-rated in other assessed areas.