Academics are easy to caricature. Sketch a figure in a rumpled suit jacket with messy hair and a pair of glasses clinging doggedly to the tip of his nose and you’ll win that round of Pictionary. Dr James Pennebaker, though, defies expectations. A renowned researcher, author, and chair of the psychology department at the University of Texas at Austin, he blends down-to-earth bonhomie with a taste for Lanesborough Hotel martinis, and hones his brilliant mind with long-distance running.