Somatic markers and explicit knowledge are both involved in decision-making

NEUROPSYCHOLOGIA

卷:47

Article

Guillaume, Sebastien^1,2,3  Jollant, Fabrice^1,2,3  Jaussent, Isabelle^1,2  Lawrence, Natalia⁵  Malafosse, Alain^2,4  Courtet, Philippe^1,2,3 

[1] Univ Montpellier, F-34000 Montpellier, France

[2] INSERM, U888, F-34000 Montpellier, France

[3] CHU Montpellier, Dept Psychol Med & Psychiat, F-34000 Montpellier, France

[4] Univ Hosp Geneva, Dept Psychiat, Chene Bourg, Switzerland

[5] Cardiff Univ, Wales Inst Cognit Neurosci, Sch Psychol, Cardiff, Wales

关键词: Decision-making;    Somatic marker hypothesis;    Iowa Gambling Task;    Explicit knowledge;    Learning;   

DOI  :  10.1016/j.neuropsychologia.2009.04.003

来源: Elsevier

【 摘 要 】

In 1994, it was proposed that decision-making requires emotion-related signals, known as somatic markers. In contrast, some authors argued that conscious knowledge of contingencies is sufficient for advantageous decision-making. We aimed to investigate the respective roles of somatic markers and explicit knowledge in decision-making. Thirty healthy volunteers performed the Iowa Gambling Task (IGT). Conscious knowledge was assessed using a sensitive questionnaire and skin conductance responses (SCRs) were recorded. Most participants acquired a preference for advantageous choices during the task and generated larger anticipatory SCRs before disadvantageous relative to advantageous choices. Performance on the IGT and the autonomic response were positively correlated (r = 0.38, p = 0.045). Moreover, there was a statistically significant difference in performance according to conscious awareness (p, = 0.009). There was no significant association between level of explicit knowledge and SCR (p = 0.1). Finally, we did not find any interaction between explicit knowledge and performance although a lack of statistical power is not to be excluded. Advantageous decision-making therefore seems to be associated with two distinct, namely implicit and explicit, systems. (C) 2009 Elsevier Ltd. All rights reserved.

【 授权许可】

Free