When students in a study watch even brief (two, five or ten second) glimpses of strangers expressing these positive actions on soundless video clips, the student were deeply influenced. Along with study co-author Robert Rosenthal, they started by showing students 10-second clips. No matter how thinly Ambady sliced the behavior of those in the study, the more positive and likable the teaching assistants appeared to be, the higher their evaluations. And how does surgeons’ behavior towards patients affect the number of malpractice suits they get? Key was voice tone.

Source: Forbes January 16, 2017 00:58 UTC