Our cautious ancestors, when yawning, blocked the way to the entrance of evil spirits by putting their hands before their mouths. We find a reason for the gesture in the delicacy of manner which forbids an indecent exposure.
Social psychology is especially interested in the effect which the social group has in the determination of the experience and conduct of the individual member.
What gives it its human character is that the individual through language addresses himself in the role of the others in the group and thus becomes aware of them in his own conduct.
