Written from the perspective of selectionist theory, this text presents a theoretically integrated approach to the study of animal learning and human cognition that co-ordinates behavioural research and research in neuroscience. It covers traditional topics such as acquisition and extinction of behaviour, stimulus control and schedules of reinforcement, and also deals with topics of student interest such as perception, memory, problem solving and verbal behaviour. All of these topics are discussed in terms of principles established by experimental analysis at the behavioural and neural levels, and scientific interpretation based on those principles.