Reinforcement sensitivity theory (RST) and body change behaviour in males

Mussap, Alexander 2006, Reinforcement sensitivity theory (RST) and body change behaviour in males, Personality and individual differences, vol. 40, no. 4, pp. 841-852, doi: 10.1016/j.paid.2005.08.013.

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Title Reinforcement sensitivity theory (RST) and body change behaviour in males
Author(s) Mussap, AlexanderORCID iD for Mussap, Alexander
Journal name Personality and individual differences
Volume number 40
Issue number 4
Start page 841
End page 852
Publisher Pergamon
Place of publication Oxford, England
Publication date 2006-03
ISSN 0191-8869
Keyword(s) reinforcement sensitivity theory
unhealthy body change; Eating disorders
obligatory exercise
strategies to increase muscle
Summary According to the unrevised Reinforcement Sensitivity Theory two motivational systems shape personality: a behavioural approach system (BAS) that determines sensitivity to rewards, and a behavioural inhibition system (BIS) that determines sensitivity to punishments. The role of reinforcement sensitivity in body change behaviour in males was explored with a non-clinical sample of 120 men aged 18–40 years. Self-reported symptoms of unhealthy weight loss (weight preoccupation, fasting, bingeing/purging) and body development (muscle/size preoccupation, obligatory exercise, use of chemical supplements) were regressed on measures of BAS and BIS sensitivity. Significant relationships were observed between BAS sensitivity and body development, and between BIS sensitivity and weight loss. These relationships were mediated by internalization of the athletic/muscular ideal, body comparisons, the importance of achieving one’s ideal or ‘best possible’ body (in the case of BAS but not BIS), and body dissatisfaction (in the case of BIS but not BAS). These results support the proposition that body development in males is influenced by sensitivity to rewards associated with achieving a certain body shape, and that weight loss is influenced by sensitivity to punishments associated with possessing an unsatisfactory body shape.
Notes Available online 3 November 2005.
Language eng
DOI 10.1016/j.paid.2005.08.013
Field of Research 170106 Health, Clinical and Counselling Psychology
Socio Economic Objective 970117 Expanding Knowledge in Psychology and Cognitive Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2005, Elsevier Ltd
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Document type: Journal Article
Collections: Faculty of Health
School of Psychology
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