The candidate fits into the interviewer's stereotypes. The candidate with the halo relaxes the interviewer. There is a sharing of identiy. The interviewer is stimulated, feels good is enlivened. Subsequently even though substantial favourable information is then received from a candidate - the unfavourable picture can stick.
Initial opinions arise from the application form and applicant appearance.
If this is so we might hypothesise that it becomes even more difficult for interviewers to avoid prior judgments. Such instances indicate how the interview as a vehicle for gathering more information may become ill-balanced and tainted. Selectors who make up their minds prematurely can readily betray themselves to applicants through, perhaps, a less attentive manner and non-verbal communication. Would we not argument that conventions of politeness must be maintained to minimise the obvious problem of the superior-supplicant relationship. The interview is between two gentle-people.