Psychology professor shares tips for detecting lies.

Psychology professor Richard Wiseman explains how to identify a liar by focusing on audio cues rather than visual cues, as the latter can be highly controllable. He also discusses the importance of establishing a baseline and looking for certain signals away from that baseline, such as hesitations and dropping of certain words. Wiseman notes that lying is cognitively difficult and that some people can hide their body language tells, but most cannot. He also emphasizes that lying is not always bad and that it depends on the situation, and that lie detectors are not always reliable.