본 연구는 체화된 인지(embodied cognition) 이론에 근거하여 의지와 자기 조절과 관련된 신체적 동작인 손을 움켜쥐는 동작이 실제 경제적 선택에서의 인내심을 높이는 데에도 영향을 미칠 수 있는지를 실험을 통하여 검증하였다. 참가자들은 손으로 펜을 힘주어 움켜쥐는 동작과 펜을 느슨하게 쥐는 동작의 두 가지 자기 조절 동작 중 하나를 유지한 상태에서 적은 금액이지만 당장 수령 가능한 보상(Smaller, Immediate Rewards: SIR)과 상대적으로 큰 금액이지만 일정한 기간 이후에야 수령 가능한 보상(Larger, Delayed Rewards: LDR) 중 하나를 선택하는 일련의 지연 할인 과제를 수행하였다. 실험 결과 지연 보상 금액의 크기 조건과 자기 조절 동작 조건 간의 유의미한 상호작용이 나타났다. 지연 보상의 금액 크기가 적은 25,000-35,000원 조건에서 손을 움켜쥐는 동작은 참가자들의 지연에 따른 보상 가치의 할인 정도를 감소시켜 즉각적 보상보다는 지연 보상을 선택하는 확률을 높이는 것으로 나타났다.
Based on the theory of embodied cognition, this study investigated the effect of bodily posture associated with self-regulation on economic decisions involving delayed rewards. Participants were randomly assigned to one of the two conditions: Firming condition where participants were asked to clasp a pen firmly against their palm and no-firming condition where participants were asked to hold pen loosely between their index and middle fingers. While maintaining the respective bodily posture, participants were then asked to make a series of monetary decision, which involves choices between smaller, immediate rewards (SIR) and larger, delayed rewards (LDR). The results demonstrated that, compared to those in the no-firming condition, participants in the firming condition were more likely to discount the value of delayed rewards in a lesser degree and choose larger, delayed rewards (LDR) instead of smaller, immediate rewards (SIR). The effect, however, was significant only when the size of LDR was small. The implication of this finding was discussed.
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