A2 Psychology Eating Behaviour Essays

A2 Psychology Eating Behaviour Essays-68
For example, the biological approach is not able to explain cultural changes in AN and the way that incidence rates are increasing rapidly in non-Western cultures such as Japan.

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It also leads to questions regarding how the symptoms of AN might be passed on by natural selection, as they decrease fertility and could even kill the individual suffering with it.Neural explanations for AN focus on serotonin and dopamine. gave amphetamines to participants to increase the release of dopamine.They found that healthy participants reported euphoria (pleasure), but AN patients experienced anxiety.Biological explanations for AN can also be criticised for being biologically reductionist.By oversimplifying AN in terms of genes and neurotransmitters, the social context within which it develops has not been considered.Evidence to support the genetic explanation comes from Holland et al., who found a concordance rate of 56% for MZ and 5% for DZ.MZ twins share 100% of their genes, compared to DZ twins who only share 50% of their genes, so this suggests that genes must have some influence on the development of AN.You can also follow @tutor2u Psych on Twitter, subscribe to our You Tube channel, or join our popular Facebook Groups.Much cheaper & more effective than TES or the Guardian.- - - - - - - - - Question 27: (2 marks) One strength of restraint theory is that there is evidence to support it.Wardle and Beales randomly allocated obese women to 3 groups (diet, exercise or control) and found that the diet group (restrained eaters) ate more than either of the other two groups.


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