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Year 13 Psychology - Biological Model of Addiction (Summer Lessons 3)

AO2/AO3 Biological Explanations to addiction

Clare Schulze

on 7 February 2016

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Transcript of Year 13 Psychology - Biological Model of Addiction (Summer Lessons 3)

How do you know its to do with my genes & neurotransmitters....prove it!!!!
Overview of the Biological Model
Sees addiction as an illness
The individual does not have control over this
Someone is either an addict or not
Genetic Factors
* Ideally be able to outline the impact of at least one gene on the likelihood of someone becoming addicted.
= DRD2 Gene!
The DRD2 gene codes for D2 dopamine receptors
Within the gene there is an A1 variant
Those with the A1 variant have significantly fewer dopamine receptors
The Biological model argues that people have a predisposed biological vulnerability to addiction
(its in the genes!)
Turned Discussion
Team discussion - Everyone in your team take turns to share their answer/idea
Biological Explanation of Smoking
The more we use a substance or carry out certain behaviours, the more tolerant we are to its effects, so addicts must continue the addictive behaviour more and more to maintain the subsequent positive feeling it creates.
Withdrawal occurs when the addict stops engaging in the addictive behaviour, but a range of unpleasant physical symptoms arise, known as “withdrawal symptoms.”
Neurotransmitters play a role in both chemical and non-chemical addictions, as the addictive substance or behaviour causes changes in the brain chemistry following repeated use. Dopamine is the main subject of research.
The Challenges!
Overall AO2 & AO3 evaluation points
• Reductionist-reduces complex addictions to too simple a level.
• Lacks free-will- says people are bound to become addicted.
• Individual differences: explains why some people develop addictions and others don’t in the same bad environments (those that do have a genetic pre-disposition).
• Strong research support to suggest runs in families (but is that just due to genetics?)
• Lots of research done on animals- cannot generalise to humans.
• Culture- Addictions seem to be more of a western problem. Why?
• Most research focuses on drugs and therefore not as much is known about causes of gambling.
At the end of each turn make sure you praise the ideas you've just heard.
4. Identify as many key points as you can which outline how genetics could explain addiction.
1. Name as many assumptions of the biological approach as you can
2. Name as many studies as you can (related to biological approach)
3. Identify as many key points as you can which outlines how dopamine could explain addiction.
Work through me
The talker gives step-by-step instructions of how to solve the first problem.

The writer write the step-by-step solution in the talker's book (coach them if needed)

Writer to praise the talkers answers
Use your revision book for help
Review the biological approach
Next week - up to an 8 mark assessment on the biological approach
Full transcript