Why do people say one thing and do another? Why do people behave inconsistently from one situation to another? How do people translate their beliefs and feelings into actions? This thoroughly revised and updated edition describes why and how beliefs, attitudes and personality traits influence human behaviour. Building on the strengths of the previous edition, it covers recent developments in existing theories and details new theoretical approaches to the attitude-behaviour relationships. These novel developments provide insight into the predictability - and unpredictability - of human...