Plan for exam question. Models of addiction


"No single model of addiction can explain all aspects of addictive behaviour"


Biological Model

Disease models

  • Genetics may play a role in addictive behaviour.
  • Multiple genes probably involved
  • Dopamine levels rise cigarette
  • Other addiction e.g. cannabis links to gene in different brain system
  • Most genetic vulnerability research has been done into alcohol addiction 
  • Many family studies show high rates amongst relatives of a alcohol misuser. Although other studies show similar results impossible to separate environmental and genetic factors 
  • Personality factors (psychological) and the way different addictive substances are metabolised in the brain (biochemical) would be nessary to observe the effect of on addiciton. 
  • The trigger to start an addictive behaviour is likely to come from environmental factors.


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