In: Operations Management
The other cognitive bias closely related to Halo Effect is the Horn Effect, that causes one's perception of another to be unduly influenced by a single negative trait.
One must trained himself to overcome this cognitive bias which influences one single good (halo) or bad ( horn ) trait in an individual to overshadow all other traits, behaviour actions or beliefs.
The most common horn effect would be if someone is overweight they are also lazy. It is very difficult the reverse the attributes one they are labelled to someone and if the first trait turns out be negative.
The best way to avoid the horn effect setting aside emotional reactions and focusing on professional behaviour and traits.
Objectively analyze the individual/candidate and let the meeting/interview revolve around the job and job requirements.
Design the questions in a manner to given the candidate enough space and imagination of a certain situation and analyse their behavour based on their answers.
A company can be affected by judgement of halo effect or horn effect.
Explained by example: Candidate for the post of Receptionist is required to be presentable in appearance. However, an extraordinarily beautiful candidate turns up for interview and the aura itself makes the interviewer complexed and submissive thus not focusing on the questions designed for the interview but adding on to the halo effect past experiences etc and failing to ask why previous job was left and whether the candidate was terminated. Here the interviewer is sublime and thinks"how can anyone terminate such a good looking and impressive receiptionist".... however, the iq levels could be low in average thus causing many errors in the work and losses to the company.
The Horn Effect infact, is the reverse and to given an example, candidate has a certain time frame missing on his/her CV and on enquring why not experience is noted during these particular months, it comes to light that the candidate had been arrested on a wrong charge and had to serve sentence for 3 months. At the interview the candidates presents his clearance certificate and jugement thus explaining how the wrong charges were thus cleared and he/she was released upon trial. The horn effect will not allow the interviewer to read this judgement in detail, and hence overshadow the fact that, the candidate is suitable for the job and also in need of one, but the fact that an individual has served sentence will erase all the possibilities of looking at the CV further.
Companies will lose good candidates on account of the horn effect.