What you wear says a lot about you, but not as much as your facial expressions. Consider the way President Obama’s expressions and lack there of influenced peoples’ reactions to the first Presidential debate.
Scientists have debated for decades whether facial expressions of emotion were universal to the human race or culturally learned, and it seems to be a combination of both. The universally recognized expressions consist of anger, disgust, fear, happiness, sadness and surprise.
Paul Ekman, an American psychologist, has spent over 30 years studying human facial expressions, ultimately focusing on micro-expressions. Lasting about 1/25th of a second, these involuntary facial expressions occur in both humans and chimpanzees when trying to suppress an emotion. Dr. Ekman believes understanding micro-expressions is the key to developing better law enforcement and terrorist detection techniques.