Psychology can be divided broadly into two branches: natural science and social science. In the natural science branch, students will learn about basic processes of cognition and behavioural neuroscience, including the effects of brain damage or drug-induced changes on behavior, how various neurochemicals affect normal and abnormal behavior, mechanisms of memory, motor control, and how we solve problems. The social science branch of psychology focuses on child development, personality differences, how people act in groups or organizations, health-related behaviours, and various aspects of normal and abnormal behavior. Three plans are available that will lead to a B.Sc.(Hons) degree: the Major (Science) in Psychology and two interdisciplinary Plans, the Biology-Psychology Specialization (see the Biology section of this Calendar) and the Cognitive Science Specialization (see the Computing section of this Calendar). Three plans are available that lead to a B.A.(Hons): the Major (Arts), Medial (Arts), and Minor/General (Arts). Students in all Honours Plans are required to complete courses in both the social and natural science branches for breadth, as well as core courses in statistics and research design.