Louisa is in the process of interviewing the prospective employees for an open position in the accounting department of a small publishing company. She has already interviewed several strong candidates, but she is looking forward to interviewing one of the candidates whose resume has struck her as showing significant potential. When this employee enters the room, however, it is obvious that he has not fully conquered his preinterview nerves, and he stumbles through the first few questions. By the end of the interview, however, the candidate is doing well, responding articulately and living up to the potential indicated in his resume. Louisa, though, is unable to overcome her disappointment with the candidate's earlier nervousness and fails to see his improvement during the interview. Louisa is thus displayed by which of the following types of interview bias?