Hormones and Genetics in Aggression

Biological explanation of aggression

· The role of neural and hormonal mechanisms in aggression

· The role of genetic factors in aggressive behaviour

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Social Psychological approach to aggression
Social Psychological theories of aggression-SLT,
Explanations of institutional aggression
Biological explanation of aggression
The role of neural and hormonal mechanisms in
The role of genetic factors in aggressive behaviour
Aggression as an adaptive response
Evolutionary explanations of human aggression,
including infidelity and jealousy
Explanations of group display in humans e.g. sports events
and lynch mobs
The role of Neural & Hormonal mechanisms in aggression

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There is little doubt that hormones and neural mechanisms have an effect on our
behaviour and have been used in many psychological disorders such depression and
eating disorders.
Hormones are certainly linked to a person's behaviour because the presence or
absence has been shown to have numerous effects on a number of organisms.
Testosterone has been shown to correlate with the level of aggression displayed by
humans and animals.…read more

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Sapolsky said that although the 1st option seems best. The 2nd option is far more
likely. The example given is that; if you were to put a group of men in a room you
would not be able to tell their levels of aggression just by looking at their levels of
testosterone. However if you observed who was most aggressive and measured their
testosterone levels, the most aggressive person would have the highest level of
testosterone.…read more

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There is huge evidence and support that there is a genetics side to aggression.
Grigorenko & Sternberg (2003) said that genetic factors do not work in isolation
but alongside environmental factors as well.
Early research concentrated on the abnormalities in the genes, specifically the XYY
genotype. This is proven later however not to be the case. According to Sapolsky
genes are the `hands behind the scenes' directing testosterone/ oestrogen. Genes
determine the synthesis of testosterone receptors and how many and how
sensitive such receptors are.…read more

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Aim/Hypothesis The aim of the study was to see if aggressive behaviour was
due to the deficiency of MAOA (with the inclusion of
environmental factors)
Method/Experiment The observation consisted of 1037 children (442 boys) who
were observed over 26 years from birth to adulthood. They
concentrated on the production of MAOA.
They were recorded as having low or high levels of MAOA.
They also examined the upbringing of the child, noticing any
incidents of abuse or maltreatment.…read more


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