Definitions of abnormality include, deviation from social norms, failure to function adequately, statistical infrequency and deviation from ideal mental health.
The behavioural, emotional and cognitive have characteristics towards phobias, depression and OCD (Obsessive Compulsive Disorder).
The behavioural approach to explaining and treating phobias: the two-process model, including classical and operant conditioning; systematic desensitisation, including relaxation and use of hierarchy; flooding.
The cognitive approach to explaining and treating depression; Beck'snegative triad and Ellie's ABC model; cognitive behaviour therapy(CBT) including challenging irrational thoughts.
The biological approach to explaining and treating OCD: genetic and neural explanations; drug therapy.