Biological Approach

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  • Biological Approach
    • Assumptions
      • Everything is first biological than psychological
      • To understand human behavior we need to look at biological structures and processes within the body.
    • Genetic basis
      • Behavior geneticists study whether behavioral characteristics are inherited the same way as physical characteristics
      • Twin studies are used to determine the likelihood that certain traits have a genetic basis by comparing concordance rates
        • If MZ twins have a higher concordance rate than DZ twins then it would suggest a genetic basis
    • Genotype and phenotype
      • Genotype (persons genetic makeup)
        • Influenced by environmental factors
      • Phenotype (way genes are expressed through characteristics )
    • Evolution and behavior
      • Darwins theory of natural selection
        • Genetically determined behavior that enhances an individuals chances of survival will continue for future generations
      • This occurs naturally as some traits give the possessor certain advantages
        • This advantages means they are more likely to survive, reproduce and pass on these traits
    • Evaluation
      • Real-life application
        • Increased understanding of biochemical processes led to the development of psychoactive drugs which helps to treat serious mental illnesses
          • Means that patients can manage their conditions and try and have a relatively normal life
      • Scientific methods of investigation
        • Use of precise and highly scientific methods such as EEGS
          • Possible to actcurately measure biological processes in ways that are not open to bias
            • Reliable data
      • Causal conclusions
        • Bio approach offers explanations for mental illnesses using neurotransmitters
          • This evidence comes from studies that a particular drug reduces symptoms of a mental disorder and it is assumed that the neurochemical in the drug causes the disorder
            • Limitation as it is claiming to discover causes when only an association exists

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