- American psychologist and pioneer in the study of emotions and facial expressions.
- Known for his work on deception and nonverbal communication.
- Developed the Facial Action Coding System (FACS), a system for measuring and describing facial expressions.
- Author of several books on deception and facial expressions, including:
- Telling Lies
- Emotions Revealed: Recognizing Faces and Feelings to Improve Communication and Emotional Literacy
- Unmasking the Face: A Guide to Recognizing Emotions from Facial Expressions
- Why Kids Lie: How Parents Can Encourage Truthfulness