The Biological Model of Abnormality

Yesterday we began to look at different models of abnormality. A model in this sense is a general theory or explanation - a set of assumptions and ideas about the causes of abnormality in this case. We will return to each of the approaches we covered at the start of the course (psychodynamic, behavioural and cognitive) to look in more depth at how they explain abnormal behaviour, and how they propose it should be dealt with.

To revise the key ideas of the approaches we looked at various explanations for the eating disorder Anorexia Nervosa. You don't need to know about any specific psychological disorders for your exam, but it's useful to know examples to extend your answers. Here are the cards we used in the lesson.

The biological model assumes that psychological disorders have physical causes in the brain - these may be genetic in origin, or be caused by infection. The structure of the brain (neuroanatomy) may be changed, or the balance of neurotransmitter chemicals (brain biochemistry) may be the problem.

Here is the presentation from the lesson.

Homeword for Tuesday 8th November is to complete notes on the Biological Model using your textbook, and focusing on its strengths and limitations. A list of points to use:
 
Successful explanation of general paresis (insanity caused by syphilis bacteria)?

• Humane or inhumane?
• Cause or effect?
• Objective, scientific evidence?
• Inconclusive evidence?
• Diathesis-Stress? - We will spend some time on this last one next week.