The boundary model (Herman and Polivy,1984)
Combines both physiological and psychological cognitive processes
We have a body weight set-point which we try to maintain
When we diet we set a cognitive boundary lower than the body weight set-point
Unrestrained eaters simply eat until they reach their body weight set-point
Dieters eat until they reach their cognitive boundary
Herman and Mack (1975) - 45 female students divided into 3 groups.
- 1 group had no food as a preload before the 'taste test'
- another group had a high-calorie milkshake as a preload
- the third group had two milkshakes as a preload
- All groups given tubs of ice cream - told they could eat as much as they liked in 10 mins and then to rate it's taste.
- Then given a questionnaire on attitudes to food and dieting to identify restrained and unrestrained eaters.