This accessible introductory text covers core domains of variation in individual differences: the history, philosophy and methods used in individual differences psychology, personality, intellect, affect and the self. It provides concise and focused coverage of the central concepts, research and debates in this key area, while developing students' higher level skills. Activities help readers build the underpinning generic critical thinking and transferable skills they need to become independent learners, and to meet the requirements of their programme of study.