Explanations for the success and failure of dieting

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1. What role do hormones, particularly ghrelin, play in the failure of dieting?

  • When you are hormonal, you will want to eat more regardless of dieting restrictions
  • They are just there bloody deal with it
  • Stimulates appetite, making hungry people feel hungrier
  • Makes you think you are hungry when you have just eaten
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2. Why do people who have problems maintaining concentration struggle with diets?

  • Lose motivation in dieting in general
  • Because they lose focus on targets and behavioural strategies that they should be undertaking
  • Forget why they are on the diet in the first place
  • Old habits are more easily recovered in people who have little focus

3. What is the theory that suggests that our body has a particular range (about 10%) if weight it is comfortable in and therefore make it harder to lose and keep off a certain weight?

  • High metabolism theory
  • Set point theory
  • Dual model centre of feeding
  • Biological theory

4. What is a weakness of these studies?

  • Low ecological validity
  • Reductionist and doesn't support psychology being a science
  • Most are Eurocentric and gender biased to mainly women
  • Ethnocentric and androcentric

5. Mann did a meta-analysis of 14 studies that followed pps over 4 years after a diet, what did he find?

  • After a while, the weight gradually came back to the original weight
  • That some kept off the weight and some didn't
  • On the long term, pps had gained all back but 3kg of their original weight before the diet
  • That the pps had kept off all the weight because of the change in mindset


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