How much does a teacher teach without speaking?, David Matsumoto

David Matsumoto is a psychology professor at San Francisco State University (SFSU). His mastery of microexpressions, gestures, non-verbal behavior, culture, and emotion have made him one of the leading experts in these areas. Currently, he is the director of the Emotion and Culture Research Laboratory at SFSU , focused on studies that revolve around social interaction, and communication. In addition, Matsumoto founded the East Bay Judo Institute in El Cerrito, California. He has a seventh-degree black belt and is a licensed class-A trainer and referee.