The Biological model of abnormality and treatments

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1. What did Gottesman discover?

  • Having an identical twin with Schizophrenia gave you a 48% chance of getting the disease, this reduced to 17% in non-identical twins
  • 5/47 of the children whose biological mothers had Schizophrenia developed the disease as opposed to 0/45 in the control group
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2. What points can be used evaluate Heston's research?

  • Interviews were used to collect the data which is a naturalistic way but they can be affected by social desirability bias
  • It has a high ecological validity as the meta-analysis was carried out on field studies, there must be other factors involved as not all the second twins developed the disorder and family environment may play a part.

3. What is meant by brain injury being the cause of psychological disorders?

  • Accidental brain injury may caused psychological disorders such as in the case of Phinaes Gage
  • Faulty genes are known to cause some diseases that have psychological effects such as Huntington's disease
  • Too much or too little of a particular neurotransmitter may produce psychological disorders such as an increased level of dopamine being linked to Schizophrenia

4. What points can be used to evaluate Gottesman's study?

  • It has a high ecological validity as the meta-analysis was carried out on field studies, there must be other factors involved as not all the second twins developed the disorder and family environment may play a part.
  • Interviews were used to collect the data which is a naturalistic way but they can be affected by social desirability bias

5. Which piece of research supportd Gottesman's study?

  • Heston's study into adoption
  • Heaton's study into adoption
  • Palmer's study into adoption

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