본 연구에서는 평소 섭식억제를 많이 하는 사람들의 섭식 행동이 사전음식섭취와 보상단서에 민감하게 반응하도록 하는 특성적 경향성인 행동활성화체계(Behavioral activation system; Gray, 1990)의 개인차에 따라서 어떻게 달라지는가를 알아보고자 하였다. 먼저 여자 대학생 215명을 대상으로 섭식억제수준과 행동활성화체계의 개인차를 측정하는 질문지를 사전에 실시하여, 이들 중 172명을 섭식억제수준의 높고 낮음과 행동활성화 경향성의 높고 낮음에 따라서 4집단으로 나누었다. 이후 신제품 아이스크림의 맛을 평가하는 연구라고 위장된 실험에 참가시켜 사전에 칼로리가 높은 초코 드링크를 먹거나 먹지 않는 조건에 무선 할당하였다. 연구결과, 첫째 섭식억제 수준과 사전음식섭취에 따라서 아이스크림의 섭취량이 달라지게 될 것이라는 가설은 지지되지 않았다. 둘째 섭식억제집단에서는 행동활성화체계 민감성의 고저에 따른 아이스크림 섭취량의 차이가 유의하게 나타났으나 섭식비억제집단에서는 행동활성화체계 민감성의 고저에 따른 아이스크림 섭취량의 차이가 유의하지 않았다. 아울러 행동활성화체계의 하위 차원들이 섭식억제수준과 어떻게 상호작용하는지를 탐색적인 수준에서 알아보았다. 그 결과, 섭식억제집단의 경우 보상반응민감성과 재미추구 경향성에서는 위의 상호작용효과가 나타났으나 추동 하위 차원에서는 상호작용효과가 유의하지 않았다. 이러한 결과는 행동활성화체계의 개인차가 섭식억제자의 섭식행동을 중재(moderate)할 가능성을 제안하는 것이다.
The purpose of this study was to investigate the moderating effects of BAS(Behavioral activation system; Gray, 1990) on eating behavior in case of food preloading. 172 college female subjects were classified as either restrained eaters or unrestrained eaters on the basis of their scores on the Lee(1999)'s Revised Restraint Scale and high or low BAS sensitivity group on the basis of the BAS Scale score. Subjects were randomly assigned to preloading condition, in which subjects were forced to have chocolate drink before ice cream taste test, or non-preloading condition. The experiment was a 2(restraint level: restrained eaters/unrestrained eaters) × 2(BAS sensitivity: high and low) × 2(preloading: 0cc/235cc) completely randomized factorial design. The main results of this study were as follow: First, the level of restraining and preloading interaction effects were not significant, which means there was to no disinhibition effect for restrained eaters by preloading. Second, there were significant interaction effects of the BAS sensitivity level and restraint level. Restrained eaters with high BAS sensitivity ate more ice cream than did restrained eaters with the low BAS sensitivity. On the other hand, non-restrained eaters did not differ in their ice cream consumption according to their BAS sensitivity levels. Differential effects of sub-component factors of BAS were explored. As a result, the similar pattern of interaction effects were found significant in the 'reward sensitivity’ and 'fun seeking' sub-component factors of the BAS. However, there were no significant interaction effects in the 'drive' factor of the BAS. The results of this study were discussed in relation to the previous studies and future research directions.
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