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Disentangling the Effects of Serotonin on Risk Perception: S-Carriers of 5-HTTLPR Are Primarily Concerned With the Magnitude of the Outcomes, Not the Uncertainty

Artikel i vetenskaplig tidskrift
Författare P. Millroth
P. Juslin
Elias Eriksson
T. Agren
Publicerad i Behavioral Neuroscience
Volym 131
Nummer/häfte 5
Sidor 421-427
ISSN 0735-7044
Publiceringsår 2017
Publicerad vid Institutionen för neurovetenskap och fysiologi
Sidor 421-427
Språk en
Länkar doi.org/10.1037/bne0000209
Ämnesord judgment and decision making, risk, 5-HTTLPR, serotonin, reward processing, acute tryptophan depletion, dorsal raphe nucleus, transporter gene, decision-making, reward, polymorphism, ambiguity, amygdala, region, determinants, Behavioral Sciences, Neurosciences & Neurology, x cr, 1995, quarterly journal of economics, v110, p585
Ämneskategorier Neurologi

Sammanfattning

Serotonin signaling is vital for reward processing, and hence, also for decision-making. The serotonin transporter gene linked polymorphic region (5-HTTLPR) has been connected to decision making, suggesting that short-allele carriers (s) are more risk averse than long-allele homozygotes (ll). However, previous research has not identified if this occurs because s-carriers (i) are more sensitive to the uncertainty of the outcomes or (ii) are more sensitive to the magnitude of the outcomes. This issue was disentangled using a willingness-to-pay task, where the participants evaluated prospects involving certain gains, uncertain gains, and ambiguous gains. The results clearly favored the hypothesis that s-carriers react more to the magnitude of the outcomes. Self-reported measures of everyday risk-taking behavior also favored this hypothesis. We discuss how these results are in line with recent research on the serotonergic impact on reward processing.

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