non verbal behavior like smiling, walking around, head nodding and touching upper torsos whereas low rating teachers were more likely to touch their head, head shaking rather than nodding, and sitting on a chair. One study by Ambady and Rosenthal shows that subjects were able to form accurate judgement of impression by just watching short video clips of teachers providing non verbal behavior. An example from the study, participants were able to form accurate impressions of the teachers by just watching 10-second, 5-second, and 2-second lengths of short video clips about teachers walking to classrooms. Ambady research provides support that nonverbal behavior has a strong influence on impression formation of teachers. Attire and appearance The way that teachers present themselves or the attire they wear when teaching lectures can be a factor on student evaluation of teachers. According to Virginia P. Richmond, the attire of a teacher influences the way that students perceive their teacher. For example, teachers are perceived to be more competent, organized, prepared and knowledgeable when they dress formally with a coat and tie but they are also presumed to be not receptive to students' needs and low in student–teacher interaction. However, when teachers dress casually with collar-button shirts and jeans, they are perceived to be more friendly, flexible, fair and open but not so competent. From another study about predicting teacher evaluation from physical appearance, attire and appearance may be a factor influencing the rating by students but the effect will somewhat diminish when other more important and significant information is provided. For instance, the study found out that unattractive voices dilute the effects of attractive faces of teachers. Background of Dr. Fox experiment Authors Dr. Naftulin is associate professor and director of the Division of Continuing Education in Psychiatry, University of Southern California School of Medicine Mr. Ware is assistant professor of medical education and health care planning and director of research and evaluation, Southern Illinois University School of Medicine Mr. Donnelly is an instructor in psychiatry (psychology) in the USC Division of Continuing Education in Psychiatry Actor The actor portraying Dr. Fox was given one day to prepare for the lecture and was coached by the authors to present the lecture with "an excessive use of double-talk, neologisms, non sequiturs, and contradicting statements." Motivation There are previous reports and studies that show that the personality of a teacher/lecturer is one of the most important