Professor Aldert Vrij is a professor of applied social psychology at the University of Portsmouth in England, UK. He is a world-leading authority in deception and lie detection. Professor Vrij has conducted extensive research into deception including nonverbal cues, speech and written statement analysis and neurophysiological responses. He investigates lie detection tools such as behavior analysis interview, statement validity assessment, voice stress analysis and more. Professor Vrij has published over 400 articles and book chapters.