Working memory constrains human cooperation in the Prisoner's Dilemma.

Details

Serval ID
serval:BIB_8B70AF577538
Type
Article: article from journal or magazin.
Collection
Publications
Title
Working memory constrains human cooperation in the Prisoner's Dilemma.
Journal
Proceedings of the National Academy of Sciences of the United States of America
Author(s)
Milinski M., Wedekind C.
ISSN
0027-8424 (Print)
ISSN-L
0027-8424
Publication state
Published
Issued date
1998
Peer-reviewed
Oui
Volume
95
Number
23
Pages
13755-13758
Language
english
Abstract
Many problems in human society reflect the inability of selfish parties to cooperate. The "Iterated Prisoner's Dilemma" has been used widely as a model for the evolution of cooperation in societies. Axelrod's computer tournaments and the extensive simulations of evolution by Nowak and Sigmund and others have shown that natural selection can favor cooperative strategies in the Prisoner's Dilemma. Rigorous empirical tests, however, lag behind the progress made by theorists. Clear predictions differ depending on the players' capacity to remember previous rounds of the game. To test whether humans use the kind of cooperative strategies predicted, we asked students to play the iterated Prisoner's Dilemma game either continuously or interrupted after each round by a secondary memory task (i.e., playing the game "Memory") that constrained the students' working-memory capacity. When playing without interruption, most students used "Pavlovian" strategies, as predicted, for greater memory capacity, and the rest used "generous tit-for-tat" strategies. The proportion of generous tit-for-tat strategies increased when games of Memory interfered with the subjects' working memory, as predicted. Students who continued to use complex Pavlovian strategies were less successful in the Memory game, but more successful in the Prisoner's Dilemma, which indicates a trade-off in memory capacity for the two tasks. Our results suggest that the set of strategies predicted by game theorists approximates human reality.
Keywords
Biological Evolution, Humans, Memory, Models, Theoretical
Pubmed
Web of science
Open Access
Yes
Create date
25/01/2008 11:43
Last modification date
20/08/2019 15:50
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