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Serotonin and social norms: tryptophan depletion impairs social comparison and leads to resource depletion in a multiplayer harvesting game.

Bilderbeck AC, Brown GD, Read J, Woolrich M, Cowen PJ, Behrens TE, Rogers RD - Psychol Sci (2014)

Bottom Line: How do people sustain resources for the benefit of individuals and communities and avoid the tragedy of the commons, in which shared resources become exhausted?Healthy adults, alongside social partners, completed a multiplayer resource-dilemma game in which they repeatedly harvested from a partially replenishable monetary resource.Dietary tryptophan depletion, leading to reduced serotonin activity, was associated with aggressive harvesting strategies and disrupted use of the social norms given by distributions of other players' harvests.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychiatry, University of Oxford.

No MeSH data available.


Related in: MedlinePlus

Mean total number of points harvested (a) and mean final resource value (b) at the end of the multiplayer resource-dilemma game as a function of whether participants consumed (T+) or did not consume (T–) a drink containing the serotonin precursor tryptophan. Error bars show standard errors. Asterisks indicate a significant difference between conditions (***p < .005).
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fig2-0956797614527830: Mean total number of points harvested (a) and mean final resource value (b) at the end of the multiplayer resource-dilemma game as a function of whether participants consumed (T+) or did not consume (T–) a drink containing the serotonin precursor tryptophan. Error bars show standard errors. Asterisks indicate a significant difference between conditions (***p < .005).

Mentions: First, we compared the outcomes of the resource-dilemma game and the total points harvested by the T– participants and the T+ participants. Eight of the T– participants (50% of the group) exhausted the resource completely, compared with only 2 of the T+ participants (12.5%), χ2(1, N = 32) = 5.24, p = .022. The T– participants also accumulated fewer points by the end of the game (Fig. 2a), β = −294.06 (SE = 79.39), p = .0002, and finished the game with smaller final resource values than the T+ participants (see Fig. 2b), β = −122.42 (SE = 43.06), p = .0045.


Serotonin and social norms: tryptophan depletion impairs social comparison and leads to resource depletion in a multiplayer harvesting game.

Bilderbeck AC, Brown GD, Read J, Woolrich M, Cowen PJ, Behrens TE, Rogers RD - Psychol Sci (2014)

Mean total number of points harvested (a) and mean final resource value (b) at the end of the multiplayer resource-dilemma game as a function of whether participants consumed (T+) or did not consume (T–) a drink containing the serotonin precursor tryptophan. Error bars show standard errors. Asterisks indicate a significant difference between conditions (***p < .005).
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2 - License 3
Show All Figures
getmorefigures.php?uid=PMC4230382&req=5

fig2-0956797614527830: Mean total number of points harvested (a) and mean final resource value (b) at the end of the multiplayer resource-dilemma game as a function of whether participants consumed (T+) or did not consume (T–) a drink containing the serotonin precursor tryptophan. Error bars show standard errors. Asterisks indicate a significant difference between conditions (***p < .005).
Mentions: First, we compared the outcomes of the resource-dilemma game and the total points harvested by the T– participants and the T+ participants. Eight of the T– participants (50% of the group) exhausted the resource completely, compared with only 2 of the T+ participants (12.5%), χ2(1, N = 32) = 5.24, p = .022. The T– participants also accumulated fewer points by the end of the game (Fig. 2a), β = −294.06 (SE = 79.39), p = .0002, and finished the game with smaller final resource values than the T+ participants (see Fig. 2b), β = −122.42 (SE = 43.06), p = .0045.

Bottom Line: How do people sustain resources for the benefit of individuals and communities and avoid the tragedy of the commons, in which shared resources become exhausted?Healthy adults, alongside social partners, completed a multiplayer resource-dilemma game in which they repeatedly harvested from a partially replenishable monetary resource.Dietary tryptophan depletion, leading to reduced serotonin activity, was associated with aggressive harvesting strategies and disrupted use of the social norms given by distributions of other players' harvests.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychiatry, University of Oxford.

No MeSH data available.


Related in: MedlinePlus