Vernell is being interviewed for a job. Though it isn't really true, the interviewer suspects that Vernell is incompetent. Because the interviewer doesn't expect much from Vernell, he sits far away from her during the interview, interrupts her frequently, and seems distracted when she speaks. As a result, Vernell becomes nervous, starts to stutter, and loses her train of thought several times. The interviewer's final impression is that Vernell is, as he suspected, incompetent. This impression is most likely the result of a _________-______________ _______________.