scholarly journals Human players manage to extort more than the mutual cooperation payoff in repeated social dilemmas

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Chiara D’Arcangelo ◽  
Luciano Andreozzi ◽  
Marco Faillo
Keyword(s):  
Nash Equilibrium ◽  
Human Subjects ◽  
Social Dilemmas ◽  
Social Dilemma ◽  
The Other ◽  
Common Interest ◽  
Mutual Cooperation ◽  
Coordination Problems ◽  
Lack Of Information ◽  
Do So

AbstractSocial dilemmas are mixed-motive games. Although the players have a common interest in maintaining cooperation, each may try to obtain a larger payoff by cooperating less than the other. This phenomenon received increased attention after Press and Dyson discovered a class of strategies for the repeated prisoner’s dilemma (extortionate strategies) that secure for themselves a payoff that is never smaller, but can be larger, than the opponent’s payoff. We conducted an experiment to test whether humans adopt extortionate strategies when playing a social dilemma. Our results reveal that human subjects do try to extort a larger payoff from their opponents. However, they are only successful when extortionate strategies are part of a Nash equilibrium. In settings where extortionate strategies do not appear in any Nash equilibrium, attempts at extortion only result in a breakdown of cooperation. Our subjects recognized the different incentives implied by the two settings, and they were ready to “extort” the opponent when allowed to do so. This suggests that deviations from mutually cooperative equilibria, which are usually attributed to players’ impatience, coordination problems, or lack of information, can instead be driven by subjects trying to reach more favorable outcomes.

Coördinatie tussen individuen en tussen teams: over het belang van inzicht in sociale dilemma's

2004 ◽  
Vol 17 (3) ◽  
Author(s):  
Marjolein de Best-Waldhober ◽  
Carsten K.W. De Dreu ◽  
Daan van Knippenberg
Keyword(s):  
Term Structure ◽  
Social Dilemmas ◽  
Social Dilemma ◽  
The Other ◽  
Long Run ◽  
Self Interest ◽  
Turn Taking ◽  
Group Negotiation

Coordination between individuals and between teams: the importance of insight in social dilemmas Coordination between individuals and between teams: the importance of insight in social dilemmas Marjolein de Best-Waldhober, Carsten K.W. De Dreu & Daan van Knippenberg, Gedrag & Organisatie, Volume 17, June 2004, nr. 3, pp. 187-203. In the context of a social dilemma, in which turn taking serves collective outcomes and only in the long run self-interest and personal outcomes, we studied long-term coordination, i.e. the alternation of sacrifice to achieve maximum joint outcomes. In particular, we studied the differences between individuals and dyads (two person groups) in coordination situations. Recent studies that compared individual with group negotiation seem to lead to opposite predictions. One paradigm predicts groups will perform better, because they outweigh individuals cognitively. The other paradigm predicts individuals will perform better, because they tend to have less fear and greed than groups. Results from the current study primarily support the first explanation. Dyads were less influenced by the complexity of the situation structure than individuals, because they have a better understanding of the long term structure of the situation.

scholarly journals Honesty-Humility, Beliefs, and Prosocial Behaviour: A Test on Stockpiling During the COVID-19 Pandemic

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Simon Columbus
Keyword(s):  
Social Dilemmas ◽  
Social Dilemma ◽  
Prosocial Behaviour ◽  
Conflicts Of Interests ◽  
Personal Cost ◽  
Societal Welfare ◽  
Causal Mediation Analysis ◽  
The Relationship ◽  
Field Setting ◽  
Do So

Increasing evidence links personality to prosocial behaviour. HEXACO Honesty-Humility, in particular, has been linked to prosocial behaviour when it comes with a personal cost. Yet, evidence for such a link is mostly limited to the laboratory, although social dilemmas abound in daily life. Emergencies such as the COVID-19 pandemic pose salient conflicts of interests between individual and societal welfare. One example is the run on many basic goods in anticipation of lockdowns. Such social dilemmas afford the expression of personality traits associated with individual differences in prosocial behaviour. Indeed, across two studies (N = 601), Honesty-Humility was positively, albeit weakly associated with refraining from stockpiling in the past and intentions to do so in the future. Causal mediation analysis shows that this was not due to differences in beliefs that others would refrain from stockpiling. Instead, results suggest that faced with a social dilemma, individuals high in Honesty-Humility may have been willing to forego individual benefit. This provides rare evidence on the relationship between Honesty-Humility and prosocial behaviour in a field setting.

scholarly journals Cooperación en los dilemas sociales / Cooperation in Social Dilemmas

2012 ◽  
Vol 1 (2) ◽  
Author(s):  
Juan Carlos Aguado Franco ◽  
David De las Heras Camino
Keyword(s):  
Nash Equilibrium ◽  
Prisoner's Dilemma ◽  
Social Dilemmas ◽  
Prisoner’S Dilemma ◽  
Equilibrium Outcome ◽  
Second Person ◽  
Mutual Cooperation ◽  
Relative Value ◽  
Chicken Game ◽  
Assurance Game

ABSTRACTSocial dilemmas are situations in which individual rationality leads to collective irrationality. Prisoner's Dilemma is the best-known game depicting situations of this sort, but there are other such games. Two other games can be created by switching the relative value of the outcomes: the Assurance Game and the Chicken Game. Whereas mutual cooperation is the goal for the Prisoner's Dilemma Game and the Assurance Game, that is not necessarily the case for the Chicken Game; if one person can provide a joint benefit, then it may make no sense for the second person to duplicate the effort. In the iterated Prisoner's Dilemma, cooperation may arise as an equilibrium outcome. If the game result is infinitely repeated, cooperation may be a Nash equilibrium although both players defecting always remains an equilibrium. Multiple-person social dilemmas are examined.RESUMENLos dilemas sociales, esas situaciones en las que la racionalidad individual lleva a una irracionalidad colectiva, se han planteado generalmente en la literatura económica, de una manera comprensible e intuitiva, a través del “dilema del prisionero”, si bien existen otros juegos que presentan también la forma de dilemas sociales. En efecto, partiendo de un dilema del prisionero, y modificando ligeramente los valores relativos de los pagos, podemos encontrar dos tipos de juegos diferentes: el de coordinación o seguro y el juego del “gallina”. Los distintos modelos dependerán de los supuestos que se realicen acerca de la situación analizada, lo que conducirá a extraer, lógicamente, conclusiones muy diferentes. Además, aunque la mutua cooperación es la meta clara tanto para el “dilema del prisionero” como para el juego de coordinación, esto no necesariamente se cumple para el “juego del gallina”; si una persona puede producir ese beneficio común, no tiene sentido que el otro duplique los esfuerzos. En efecto, en este tipo de juegos, los equilibrios de Nash en estrategias puras se producen en aquellas situaciones en las que uno coopera y el otro no lo hace. Aunque el análisis de los dilemas sociales, a través del dilema del prisionero bipersonal ayuda a arrojar luz sobre el asunto, parece oportuno profundizar la investigación en dos aspectos: la consideración de un horizonte temporal superior a una única partida, y la incorporación de un número de participantes en el juego mayor que dos, lo que presenta interesantes dificultades conceptuales.

Challenging Gender Hierarchies in Narratives of the Nation: Representations of Women in Zintgraff and the Battle of Mankon and Hard Choice

Imbizo ◽  
2020 ◽  
Vol 11 (2) ◽  
Author(s):  
Naomi Epongse Nkealah ◽  
Olutoba Gboyega Oluwasuji
Keyword(s):  
The Other ◽  
Literary Texts ◽  
Gender Differentiation ◽  
Hard Choice ◽  
Other Hand ◽  
Gender Hierarchies ◽  
The Face ◽  
The One ◽  
Representations Of Women ◽  
Do So

Ideas of nationalisms as masculine projects dominate literary texts by African male writers. The texts mirror the ways in which gender differentiation sanctions nationalist discourses and in turn how nationalist discourses reinforce gender hierarchies. This article draws on theoretical insights from the work of Anne McClintock and Elleke Boehmer to analyse two plays: Zintgraff and the Battle of Mankon by Bole Butake and Gilbert Doho and Hard Choice by Sunnie Ododo. The article argues that women are represented in these two plays as having an ambiguous relationship to nationalism. On the one hand, women are seen actively changing the face of politics in their societies, but on the other hand, the means by which they do so reduces them to stereotypes of their gender.

Euthyphro, Apology, and Crito

2019 ◽  
pp. 117-140
Author(s):  
Hugh H. Benson
Keyword(s):  
The Other ◽  
Other Hand ◽  
Virtuous Life ◽  
The One ◽  
Do So

This chapter presents a reading of Plato’s Euthyphro, Apology, and Crito. These dialogues, in which Plato depicts the weeks leading up to Socrates’s last day, are replete with various philosophical explorations. Among those explorations is the question of how to live our lives. On the one hand, Socrates is clear and straightforward. We should live the examined life—making logoi and examining ourselves and others in order to determine whether we are as wise as we think we are, and we should live the virtuous life. This is how Socrates lives his life. On the other hand, the examined life undercuts, or at least should undercut, the confidence with which he seeks to live the virtuous life. It may help bring some stability to the general principles by which he lives his life, but it can do so only defeasibly and without certainty.

The Body in Theory

1998 ◽  
Vol 16 (4) ◽  
pp. 387-400 ◽  
Author(s):  
Felicity J Callard
Keyword(s):  
Queer Theory ◽  
20Th Century ◽  
The Body ◽  
The Other ◽  
Industrial Capitalism ◽  
Late 20Th Century ◽  
The Social ◽  
Theoretical Investigations ◽  
The One ◽  
Do So

Geographers are now taking the problematic of corporeality seriously. ‘The body’ is becoming a preoccupation in the geographical literature, and is a central figure around which to base political demands, social analyses, and theoretical investigations. In this paper I describe some of the trajectories through which the body has been installed in academia and claim that this installation has necessitated the uptake of certain theoretical legacies and the disavowal or forgetting of others. In particular, I trace two related developments. First, I point to the sometimes haphazard agglomeration of disparate theoretical interventions that lie under the name of postmodernism and observe how this has led to the foregrounding of bodily tropes of fragmentation, fluidity, and ‘the cyborg‘. Second, I examine the treatment of the body as a conduit which enables political agency to be thought of in terms of transgression and resistance. I stage my argument by looking at how on the one hand Marxist and on the other queer theory have commonly conceived of the body, and propose that the legacies of materialist modes of analysis have much to offer current work focusing on how bodies are shaped by their encapsulation within the sphere of the social. I conclude by examining the presentation of corporeality that appears in the first volume of Marx's Capital. I do so to suggest that geographers working on questions of subjectivity could profit from thinking further about the relation between so-called ‘new’ and ‘fluid’ configurations of bodies, technologies, and subjectivities in the late 20th-century world, and the corporeal configurations of industrial capitalism lying behind and before them.

Locomotory Diseases Influence on Body Equilibrium and Balance

2014 ◽  
Vol 555 ◽  
pp. 652-658 ◽  
Author(s):  
Barbu Cristian Braun ◽  
Ileana Constanta Rosca
Keyword(s):  
Body Mass ◽  
Human Subjects ◽  
Force Plate ◽  
The Body ◽  
The Other ◽  
New Method ◽  
First Person ◽  
Mass Center ◽  
Stability Problems ◽  
Research Stage

The paper describes a new method of body equilibrium evaluation applied for different human subjects, the principal aim being to demonstrate to what extent any locomotory diseases could influence the body stability and equilibrium. The research refers to identify some persons with different locomotory diseases and to find both the influence on equilibrium and stability and if possible to improve them. Our research stage, synthesized in this paper, explains the body equilibrium evaluation in orthostatic posture done for different subjects, aged between 20 and 40 years. A number of 10 relevant persons were considered to be evaluated, 2 of them having some locomotory diseases. The first person presents any neuro-motor stability problems in case of long standing case. The other person has both Achilles tendons torn and operated. All subjects were tested in orthostatic posture, in 3 distinct positions, using a Kistler force plate. The experiments referred to the body mass center (COM) displacement in sagittal and lateral planes, representing an interesting characteristic for its equilibrium. It was shown that the person with diseases affecting stability presented a loss of equilibrium when standing for 10-20 seconds, i.e. higher COM displacements in both planes reported to the other tested subjects.

The Prisoner's Dilemma Game and Cooperation in the Rat

1984 ◽  
Vol 55 (3) ◽  
pp. 687-696 ◽  
Author(s):  
Rick M. Gardner ◽  
Terry L. Corbin ◽  
Janelle S. Beltramo ◽  
Gary S. Nickell
Keyword(s):  
Game Theory ◽  
Visual Communication ◽  
Prisoner's Dilemma ◽  
Human Subjects ◽  
Cooperative Behavior ◽  
Prisoner’S Dilemma ◽  
The Other ◽  
Prisoner’S Dilemma Game ◽  
Prisoner's Dilemma Game ◽  
Cooperative Behaviors

Cooperation in pairs of rats playing the prisoner's dilemma game was investigated. Six pairs of animals were taught to make either cooperative or uncooperative responses by running to one or the other end of a T-maze. Two T-mazes were joined together such that animals could respond simultaneously. Animals were run under conditions in which visual communication was present and absent. Mutually uncooperative responses were the most common and mutually cooperative behaviors the least preferred. Introduction of a barrier between the mazes, which removed visual communication between pairs, sharply accentuated uncooperative behavior. Similarities of the present findings to results with human subjects and the implications of using game theory for studying cooperative behavior in animals are discussed.

Improving U-Net architecture and graph cuts optimization to classify arterioles and venules in retina fundus images

2021 ◽  
pp. 1-12
Author(s):  
Nguyen Thanh Binh ◽  
Nguyen Mong Hien ◽  
Dang Thanh Tin
Keyword(s):  
Graph Cuts ◽  
The Other ◽  
Retinal Vessels ◽  
Fundus Images ◽  
Vascular Structure ◽  
Vascular Changes ◽  
Lack Of Information ◽  
Retinal Artery ◽  
Diagnostic Indicator ◽  
Better Than

The central retinal artery and its branches supply blood to the inner retina. Vascular manifestations in the retina indirectly reflect the vascular changes and damage in organs such as the heart, kidneys, and brain because of the similar vascular structure of these organs. The diabetic retinopathy and risk of stroke are caused by increased venular caliber. The degrees of these diseases depend on the changes of arterioles and venules. The ratio between the calibers of arterioles and venules (AVR) is various. AVR is considered as the useful diagnostic indicator of different associated health problems. However, the task is not easy because of the lack of information of the features being used to classify the retinal vessels as arterioles and venules. This paper proposed a method to classify the retinal vessels into the arterioles and venules based on improving U-Net architecture and graph cuts. The accuracy of the proposed method is about 97.6%. The results of the proposed method are better than the other methods in RITE dataset and AVRDB dataset.

Toxæmia in the Etiology of Mental Disease. a Discussion opened

1902 ◽  
Vol 48 (202) ◽  
pp. 434-450 ◽  
Author(s):  
T. S. Clouston
Keyword(s):  
Nerve Cell ◽  
General Trend ◽  
Mental Disease ◽  
The Other ◽  
British Association ◽  
Younger Men ◽  
Full Knowledge ◽  
The Subject ◽  
Definition Of ◽  
Do So

Dr. Clouston said that when he suggested toxæmia to the secretary as a suitable subject for a discussion at this meeting he had not intended to be the first speaker, because his object was to bring out more fully the views of the younger members who had recently committed themselves so strongly to the toxæmic and bacterial etiology of insanity, and so to get light thrown on some of the difficulties which he and others had felt in applying this theory to many of their cases in practice. It was not that he did not believe in the toxic theory as explaining the onset of many cases, or that he under-rated its importance, but that he could not see how it applied so universally or generally as some of the modern pathological school were now inclined to insist on. He knew that it was difficult for those of the older psychological and clinical school to approach the subject with that full knowledge of recent bacteriological and pathological doctrine which the younger men possessed, or to breathe that all-pervading pathological atmosphere which they seemed to inhale. He desired to conduct this discussion in an absolutely non-controversial and purely scientific spirit. To do so he thought it best to put his facts, objections, and difficulties in a series of propositions which could be answered and explained by the other side. He thought it important to define toxæmia, but should be willing to accept Dr. Ford Robertson's definition of toxines, viz., “Substances which are taken up by the (cortical nerve) cell and then disorder its metabolism.” He took the following extracts from his address at the Cheltenham meeting of the British Association (1) as representing Dr. Ford Robertson's views and the general trend of much investigation and hypothesis on the Continent.

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