This is a title in the modular "Principles of Psychology Series," designed for A-level and other introductory courses. Cognitive psychology is a large and expanding area within psychology as a whole. However, there are certain topics, such as perception, memory, language and reasoning, which are generally regarded as being of fundamental importance. It is this core of cognitive psychology which is the focus of this book. If you have ever wondered how we perceive the world, or use language, or remember information, then this book aims to provide insights into our performance of these activities.