From 'aggression' to 'perception', Collins Key Concepts in Psychology explains the essential ideas and theories in Psychology. Whether you are looking to learn about a new concept, refresh your knowledge or advance your understanding, this title will: Provide an invaluable reference guide, completely accessible through the easy look-up book or e-version - Secure knowledge and vocabulary with the quick-reference definition and clear explanation - Give you confidence to apply understanding to a range of psychological scenarios with contextualised examples - Suit students working across secondary-level qualifications, including GCSE and A level, and at undergraduate level.