Behaviourism

An approach to psychology that emphasises observable measurable behaviour

Benzodiazepines

A class of antianxiety drugs. They are also called tranquilizers

Bipolar disorders

Disorders in which people alternate between periods of depression and mania

Borderline personality disorder

A disorder characterised by impulsive behaviour and unstable relationships, emotions, and self-image

Bulimia nervosa

A disorder involving binge eating followed by compensatory behaviours such as vomiting, fasting, excessive exercise, or use of laxatives, diuretics, and other medications to control body weight