 Observers were highly likely to agree on the perceived efficacy of a teacher or professor based on the thirty-second clips they were shown, and these ratings were strongly correlated with both student evaluations and supervisor evaluations of the teacher's efficacy in teaching the course.Another set of studies provided observers with fifteen-second thin-slice clips of occupational therapy students.Students who were rated poorly in the fifteen-second clips by naïve observers subsequently displayed poor clinical performance as well.