Mark L. Knapp (PhD, Pennsylvania State University) is the Jesse H. Jones Centennial Professor Emeritus in Communication and Distinguished. Teaching Professor Emeritus at The University of Texas at Austin. He co-edited the Handbook of Interpersonal Communication and The Interplay of Truth and Deception. In addition to authoring and then co-authoring Lying and Deception in Human Interaction, he co-authored Nonverbal Communication in Human Interaction and Interpersonal Communication in Human Relationships. He is past president and fellow of the International Communication Association and past president and distinguished scholar of the National Communication Association.