Peter Bull, PhD, FBPsS (Fellow of the British Psychological Society), is Honorary Professor in Psychology at the Universities of York and Salford, UK, and Visiting Professor in Political Communication at the University of Antwerp, Belgium. His principal interest is the detailed microanalysis of interpersonal communication: in particular, political discourse and nonverbal communication.

Maurice Waddle, PhD, lectures in psychology at the University of York, UK. His research focuses on the interpersonal communication of politicians, including their interactions with audiences, interviewers, and parliamentary opponents. He is particularly interested in the phenomenon of personalisation (i.e., playing the man, not the ball) in politics.