The Genetic Explanation of Phobias

A mindmap about the Genetic Explanation of Phobias (24 marks)

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  • The Genetic Explanation of Phobias
    • A01
      • Genes - Passed down from parents - makes up personality
      • Could inherit over-sensitive autonomic NS
        • More of an anxious personality - naturally show more anxiety towards threatening stimuli
      • PREDICTIONS
        • Twin studies - mz twins share 100% genes - there should be a higher Cc rate in MZ twins than DZ twins
        • Parents would show similar behavioural characteristicsas their child when shown a phobic stimuli
    • A02
      • FAMILY STUDIES
        • SOLYOM ET AL (1974) - 45% of ppts with phobia found family history of at least 1 person with the same phobia
        • OST (1981) People with blood phobia 64% of 25 cases, the blood phobic had at least one close relative who also suffered from blood phobia
        • Theory suggests - genetic trait 'inhibition' increases the likelihood of phobia passing to offspring
          • + by Rosenbaum et al (1991) rents of the 'inhibited' children were twice more likely to show anxiety in a new situation than those of the control group (panic disorders)
    • A02
      • TWIN STUDIES
        • interviewed 722 female twins with a lifetime history of phobias. Found - a lower Cc rate in MZ twins for agoraphobia than DZ twins. Shared environment provided better explanation
  • SOLYOM ET AL (1974) - 45% of ppts with phobia found family history of at least 1 person with the same phobia

Comments

MrsMacLean

Detailed and colourful mind map, many thanks.

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