Biological explanations of phobic disorders AO!
- Created by: Sophiemelissa
- Created on: 27-05-16 08:33
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- Biological explanations of phobic disorders
- Genetic explanation
- Twin studies
- The incidence of phobic behaviour is measured in concordance of MZ and dz twins
- Comparisons can be made between MZ and DZ twins
- If the concordance rate of MZ twins that DZ twins is higher in phobic disorders , due to MZ twins being genetically identical it suggests a genetic influence
- Concordance rate suggests the probability of one twin having a phobia if another has.
- Adrenergic theory
- Suggests people at high risk of developing phobias inherit a genetic over sensitivity of the sympathetic nervous system
- Those who have acquisition to phobic disorders show high levels of arousal in the automatic nervous system leading to increased amounts of adrenaline
- It may be that people inherit an over sensitive fear response and people with phobias respond to normal situations with abnormal levels of anxiety
- The diathesis stress model combines biological and psychologicalfactors
- Suggests people who are biologically vulnerable to developing a disorder are more likely to develop a mental disorder if they are exposed to a certain social or environmentalstressor
- Twin studies
- Evolutionary explanation
- Seligmans (1970); preparedness
- Value of anxiety is indisputable as the arguably of 'fight or flight'
- Phobias are adaptive because the fear of certain things that would have been dangerous in our evolutionary past
- Suggested humans have an innate predispositionto acquire the fear response through conditioning
- Suggests humans are biologically prepared to exhibit physiological and emotional response mechanisms to environmentaldemands.
- Seligmans (1970); preparedness
- Key terms
- Genetic explanation
- Twin studies
- Monozygotic twins
- Dizygotic twins
- Concordance rate
- Adrenergic theory
- Heritability
- Diathesis stress model
- Evolutionary approach
- Adaptive response
- Biological preparedness
- Expectancy biases
- Genetic explanation
- Twin studies
- The incidence of phobic behaviour is measured in concordance of MZ and dz twins
- Comparisons can be made between MZ and DZ twins
- If the concordance rate of MZ twins that DZ twins is higher in phobic disorders , due to MZ twins being genetically identical it suggests a genetic influence
- Concordance rate suggests the probability of one twin having a phobia if another has.
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