'Restraint model' - biological/homeostasis - by Herman and Mack (1975)- not eating increases probability of eating.....
explained by Herman and Polivy 'boundary model' - hunger keeps eating above min and satiety keeps it below max - at a 'set point'
in dieting - also a cognitive boundary - tf= 2(normal boundary)- 1 pysch and 1 cog
cog boundary is lower/smaller than psych - if person crosses cog boundary they will keep going till satiety - this boundary may be longer due to increased hunger from restraint. ='WHAT THE HELL' EFFECT (WTHE) -explains failed diets
Shows this when ps who told not to think about a white bear rung a bell signifying they were thinking about one more than ps not told not to think about a white bear
same effect when dieter try not to think about bad foods - become preoccupied -AKA THE IRONIC PROCESSES OF MENTAL CONTROL (TIPMC)
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AO2
First explanation AO2:
SGT - Herman andMack 1975 - dieters ate more ice cream than non-dieter after milkshake preload - but when no preload dieters at less ice cream than non-dieters = behavioural inhibition - ev. for WTHE - milkahsakes cross cog. bound.
+ lab = good control
- less eco val. other environ. pressures e.g. social may cause different results
WKN - 'boundary model' doesnt give details about emot/cog processes of WTHE
WKN - doesn't explain minority of successful dieters
WKN - reserch often unethical - ps told to lose weight but won't according to the theory - depressing
Second Explanation A02:
SGT - more insight ot cog/emot processes of diet failure than Restraint model
SGT - Soetens (2006) - dieters who overeat use denial more to suppress thoughts + so think more about food - TIPMC explains failure
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AO3 - IDAs
AO3:
Nature vs Nurture - biological explanation for diet failure = genetic/neurological predetermined weight - 'set point weight' - if weight is lost hunger increases + metabolism slows to compensate and increase weight - IS PYSCH EXPLANAION REDUNDANT AS SCIENCE EXPLAINS ALL?
deterministic? - can free will be ued if weight is already genetically predetermined?
- BUT biolog expl is also deterministic - can't change weight regardless of diet......BUT if people know this then diets are more likely ot fail.
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