Studies

• Name the two studies in psychological problems

  • Caspi et al (2003)- Explaining why stressful life events leads to depression
  • Youg et al (2002) - Affect of CBT training on people with internet addiction and its effect in reducing symptoms of addiction of different types
• Background to the study
• Aim of Caspi et al study

  • If stressful life events lead to deperession
  • And if stressful ife event were more likely to lead to depression if the person had a certain version of the 5HTT gene ( seratonin transporter gene which is a neurotransmitter that influences mood)
• Procedure of Caspi et al 


  Participants- were memebers of the Dunedin Multidisciplinary Health hand Development study. - the participants were studied from birth

  Total number of PPT - 847 members

  Division of PPT - divide into 3 groups based on the variation of the 5HTT gene the PPT has
• Name the 3 version of the 5HTT gene and % of participants with each

  1. 2 copies of short allele 17%
  2. 1 short 1 long allele 51%
  3. 2 copies of long allele 31%
• How did the researchers measure the stressful life events of the participants

  • Longitudinal study - participants complete questionnaires that mesure the ife events that occured between their 21-26 birthday
  • Evented recorded were problems such as
  • Money
  • Health
  • Relationships
  • Different questionnaire assesed whether they had any symptoms of depression in the year before their 26 birthday - gave Qualitiative and quantitative data in the form of a "depression score"
• Give 3 results of the study
• Give 2 results of the study
• Conclusions of caspi et al's study