the biological approach

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what are the main assumptions of the biological approach
all behaviour has a biological cause and can be influenced by the brain, cns and genes
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how are twin studies used to investigate genotype vs phenotype
monozygotic twins ( same) genotype seperated at birth and raised in different enviroments. It is likely that the twins will have different phenotypes, compare the concordance rate
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how are adoption studies used to investigate genotype vs phenotype
nvestigate the adopted child, their adopted parents and their biological parents. The child will share the same genes as their biological parents but only the same enviroment as their adopted parents. for example, if the child has a high IQ like thei
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outline darwins theory of evolution
natural selection/ adapt to survive/ fittest reproduce/ improved cognitive functioning
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influence of genes on behvaiour
A sequence of dna found in the chromosomes and determines a persons characteristics Inherited form our parents and cannot be changed
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outline the influence of genotype on behaviour
he coding of genes that an individual inherits from their parents, it determines their features and traits
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outline the influence of phentoype on behaviour
the physical characteristic of that trait, it can be influenced by both g and the enviroment. examples include home, school and famiy
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outline the influence of the brain on behaviour
contains neurtransmitters which regulate hormones different hormones linked with different emotions different parts of the brain control different behvaiours, e.g. endocrine controls hormones and the frontal lobes control speech hormonal inbalances
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how are hormone levels analysed
brain scans
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what is meant by the term 'placebo effect'
a fake treatment can have an affect on a persons condition simply because they have the expectation that it wil be helpful mor elikely they believe they will benefit form it, the more likely that they will actually benefit from it
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outline the strengths of the biological approach
1- highly scientific/ uses scientific method to collect data/ eg. valid 2- application/ psychoactive drugs
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outline the limitations of the biological approach
deterministic- behaviour is determined we have no free will- this is a weakness because the dicovery of a 'crimial gene' could complicate the criminal justice sytem reductionist- means that it reduces behaviour down into its smallest units such as
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what is the definition of genes
made up of dna and make up chromosomes also inherited form our aprents
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what is the definition of evolution
the changes in inherited characteristics in a biological popualtion over successive generations
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how are twin studies used to investigate genotype vs phenotype

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monozygotic twins ( same) genotype seperated at birth and raised in different enviroments. It is likely that the twins will have different phenotypes, compare the concordance rate

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how are adoption studies used to investigate genotype vs phenotype

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outline darwins theory of evolution

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influence of genes on behvaiour

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