Explanations for the success/failure of dieting
There are many reasons why people diet - One concerns health (e.g. the greater risk of type 2 diabetes when overweight) and the other involved body dissatisfaction (e.g. due to stigmatisation and prejudice).
1. The potential success or failure of dieting needs to be viewed in the context of genetic predispositions.
2. Research suggests some people are genetically pre-disposed to being overweight (e.g., influencing things such as appetite regulation, metabolic rate, fat cell quantities etc.)
3. Stroebe (2000) - Twin and adoption studies estimate that heredity can account for between 40% and 70% of weight.
Individual differences in responses to portion size:
People who diet may be more prone to over-eating than people who do not diet. Herman et al (2005) suggest three reasons for this:
Dieters are more likely to eat when distressed than non-dieters.
Over-eating is more likely to occur when distress is `personal` and related to negative or low moods.