Describe how the biological (medical), behaviourist and psychoanalytical models are used to explain atypical behaviour.

1.1 Using specific examples, critically discuss the concept of normality and the difficulties that are associated with a clear concept of abnormality.
1.2 Explain the main systems for the classification of mental illness.
2.1 Describe how the biological (medical), behaviourist and psychoanalytical models are used to explain atypical behaviour.
2.2 Evaluate biological, behaviourist and psychoanalytical models of atypical behaviour.
2.3 Evaluate some of the treatments and therapies that might arise from biological (medical), behaviourist and psychoanalytical models or a combination of these.