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Biological Approach (Hormones (Part of endocrine system, Released by…

- - - - More likely to lead to survival + reproductive success
  - - - Share 100% genetic info
        
        Tested to see if certain characteristics are due to environment or genetics
      - Concordance
        
        Concordant = trait displayed in one twin or neither
        
        Disconcordant = trait displayed in one twin but not the other
    - - Share 50% genetic info
  - - - Genetic configuration of individual
    - - Physical and psychological traits of organism
        
        Both genetic and environmental influences
        
        Only dominant genes expressed
    - - The more a trait is influenced by genes, the greater the heritability
      - Different combinations of genes results in different characteristics
        
        e.g. intelligence, personality, abilities
- - - - Dif. parts of brain used in dif. mental activities
  - - - Largest part of brain
      - Cerebral cortex
        
        Outer surface of cerebrum
        
        Responsible for languages and thought
      - Divided into 2 halves, hemispheres
        
        Hemispheres divided into 4 parts, lobes
  - - - Brain and spinal cord
    - - Somatic and autonomic nervous systems
        
        All conscious and unconscious muscle movement
        
        e.g. breathing, heart beating
- - - - Trigger receiving neurons, stimulates brain
      - e.g.dopamine, associated w/ drive or motivation
    - - Inhibit nerve impulses, calms brain
      - e.g.serotonin, needed to maintain stable mood
        
        People w/ low serotonin displayed increased aggression
    - - Associated w/ abnormal behaviours
        
        Lack of certain neurochemicals
        
        e.g. depression = lack of dopamine
- - - - Uses experimental method
        
        Highly controlled environment
      - Reproducible, more validity
      - Better technology
    - - Provides clear predictions
        
        e.g. effects of certain neurotransmitters
        
        Applied in drug therapies
        
        Helps chemical imbalances e.g. depression
  - - - Belief that complex behaviours can be broken down into smallest component
        
        Needs to consider other factors
        
        e.g. cognitive, social, emotional, cultural
    - - Some human behaviour have purely cultural origins
        
        e.g. incest taboos
        
        Not necessarily due to survival