We present a game semantics for Linear Logic, in which formulas denote games and proofs denote winning strategies. We show that our semantics yields a categorical model of Linear Logic and prove full completeness for Multiplicative Linear Logic with the MIX rule: every winning strategy is the denotation of a unique cut-free proof net. A key role is played by the notion of history-free strategy; strong connections are made between history-free strategies and the Geometry of Interaction. Our semantics incorporates (...) a natural notion of polarity, leading to a refined treatment of the additives. We make comparisons with related work by Joyal, Blass, et al. (shrink)

False information is always produced after the outbreak of major emergencies. Taking this into consideration, this paper discusses the behavior of multiple parties in relation to false information dissemination after major emergencies. First, a game model is constructed, using relevant knowledge of evolutionary game theory, between three parties: regulatory institutions, opinion leaders, and ordinary Internet users. Second, the model equations are solved, and the evolutionary stability strategies of each game party under different circumstances are analyzed. Third, a numerical simulation (...) is applied to the evolutionary trends under different strategy combinations with varying parameters. The results show that the probability of each game party making ideal decisions is positively correlated with the degree of punishment imposed by regulatory institutions on opinion leaders who release false information, the reward provided by regulatory institutions on opinion leaders who release positive information, the degree of participation and satisfaction gained by Internet users in adopting positive information, the richness of authentic content released by opinion leaders, and the psychological identification of Internet users with opinion leaders. Meanwhile, the probability of each game party making ideal decisions is negatively correlated with investigation and evidence collection costs borne by opinion leaders who release positive information, the additional income for opinion leaders who have false information adopted by Internet users, the costs of Internet users’ time and energy when they adopt information released by opinion leaders, and the costs of independently judging the accuracy of information by Internet users. (shrink)

In this paper, we provide a game-theoretic examination of indirect utilitarianism by comparing the expected payoffs of attempts to apply a deontological principle and a utilitarian principle within the context of the Prisoner’s Dilemma (PD). Although many of the best-known utilitarians and consequentialists have accepted some indirect form of their respective views, the results in this paper suggest that they have been overly quick to dismiss altogether the benefits of directly enacting utilitarian principles. We show that for infallible moral agents, (...) what we call ‘non-autonomous agents’, direct utilitarianism dominates indirect utilitarianism via deontology in terms of achieving the maximized utilitarian outcome, but only in underlying games where the maximized utilitarian outcome involves unequal payoffs. In other situations, indirect utilitarianism implemented through Kantian deontology either ties or dominates direct utilitarianism in terms of achieving the maximized utilitarian outcome. We also examine the two different moralities on the assumption that fallibility, which is a form of autonomy, is an aspect of moral agency by introducing Endogenized Morality Models (EMM’s). We believe that just as indirect utilitarians worry about the cost of applying moral principles, so too they should worry about the fact that humans have both pro-social and materialistically selfish motivations and hence are fallible moral agents. We show that there are conditions under which fallible autonomous utilitarians achieve higher expected material and psychic payoffs than fallible autonomous deontologists and conditions under which they do not. (shrink)

Experiments in which subjects play simultaneously several finite two-person prisoner's dilemma supergames with and without an outside option reveal that: an attractive outside option enhances cooperation in the prisoner's dilemma game, if the payoff for mutual defection is negative, subjects' tendency to avoid losses leads them to cooperate; while this tendency makes them stick to mutual defection if its payoff is positive, subjects use probabilistic start and endeffect behavior.

The multiple-choice video game Life is Strange was described by its French developers as a metaphor for the inner conflicts experienced by a teenager in trying to become an adult. In psychological work with adolescents, there is a stark similarity between what they experience and some concepts of existentialist philosophy. Sartre’s script for the movie Les Jeux Sont Faits (literally ‘‘games are made’’) uses the same narrative strategy as Life is Strange—the capacity for the main characters to travel (...) back in time to change their own existence—in order to stimulate philosophical, ethical, and political thinking and also to effectively simulate existential ‘‘limit situations.’’ This article is a dialogue between Sartre’s views and Life is Strange in order to examine to what extent questions such as what is freedom? what is choice? what is autonomy and responsibility? can be interpreted anew in hybrid digital–human—‘‘anthrobotic’’—environments. (shrink)

The multiple-choice video game Life is Strange was described by its French developers as a metaphor for the inner conflicts experienced by a teenager in trying to become an adult. In psychological work with adolescents, there is a stark similarity between what they experience and some concepts of existentialist philosophy. Sartre’s script for the movie Les Jeux Sont Faits (literally “games are made”) uses the same narrative strategy as Life is Strange—the capacity for the main characters to travel (...) back in time to change their own existence—in order to stimulate philosophical, ethical, and political thinking and also to effectively simulate existential “limit situations.” This article is a dialogue between Sartre’s views and Life is Strange in order to examine to what extent questions such as what is freedom? what is choice? what is autonomy and responsibility? can be interpreted anew in hybrid digital–human—“anthrobotic”—environments. (shrink)

We propose a formal framework for interpretable machine learning. Combining elements from statistical learning, causal interventionism, and decision theory, we design an idealised explanation game in which players collaborate to find the best explanation for a given algorithmic prediction. Through an iterative procedure of questions and answers, the players establish a three-dimensional Pareto frontier that describes the optimal trade-offs between explanatory accuracy, simplicity, and relevance. Multiple rounds are played at different levels of abstraction, allowing the players to explore overlapping (...) causal patterns of variable granularity and scope. We characterise the conditions under which such a game is almost surely guaranteed to converge on a optimal explanation surface in polynomial time, and highlight obstacles that will tend to prevent the players from advancing beyond certain explanatory thresholds. The game serves a descriptive and a normative function, establishing a conceptual space in which to analyse and compare existing proposals, as well as design new and improved solutions. (shrink)

The article analyses experimental “solidarity games” with two benefactors and one beneficiary. Depending on their motive for giving—e.g., warm glow, altruism, or guilt—the benefactors’ response functions are either constant, decreasing, or increasing. If motives interact, or if envy is a concern, then more complex (unimodal) shapes may emerge. Controlling for random utility perturbations, we determine which and how many motives affect individual decision making. The main findings are that the motives of about 75% of the subjects can be identified (...) fairly sharply, that all of the motives discussed in the literature co-exist in the population, and that for any given individual no more than two motives (out of six motives considered overall) are identified. We conclude that a unifying motive for solidarity cannot be derived even when we allow for individually heterogeneous parameterization: different subjects give for different reasons and all existing social preference theories are partially correct. (shrink)

Many weaknesses of game theory are cured by new models that embody simple cognitive principles, while maintaining the formalism and generality that makes game theory useful. Social preference models can generate team reasoning by combining reciprocation and correlated equilibrium. Models of limited iterated thinking explain data better than equilibrium models do; and they self-repair problems of implausibility and multiplicity of equilibria.

We propose a formal framework for interpretable machine learning. Combining elements from statistical learning, causal interventionism, and decision theory, we design an idealised explanation game in which players collaborate to find the best explanation for a given algorithmic prediction. Through an iterative procedure of questions and answers, the players establish a three-dimensional Pareto frontier that describes the optimal trade-offs between explanatory accuracy, simplicity, and relevance. Multiple rounds are played at different levels of abstraction, allowing the players to explore overlapping (...) causal patterns of variable granularity and scope. We characterise the conditions under which such a game is almost surely guaranteed to converge on a optimal explanation surface in polynomial time, and highlight obstacles that will tend to prevent the players from advancing beyond certain explanatory thresholds. The game serves a descriptive and a normative function, establishing a conceptual space in which to analyse and compare existing proposals, as well as design new and improved solutions. (shrink)

Axelord’s [(1970), Conflict of Interest, Markham Publishers, Chicago] index of conflict in 2 × 2 games with two pure strategy equilibria has the property that a reduction in the cost of holding out corresponds to an increase in conflict. This article takes the opposite view, arguing that if losing becomes less costly, a player is less likely to gamble to win, which means that conflict will be less frequent. This approach leads to a new power index and a new (...) measure of stubbornness, both anchored in strategic reasoning. The win probability defined as power constitutes an equilibrium refinement which differs from Harsanyi and Selten’s [(1988), A General Theory of Equilibrium Selection in Games, MIT Press, Cambridge] refinement. In contrast, Axelrod’s approach focuses on preferences regarding divergences from imaginary outmost rewards that cannot be obtained jointly. The player who is less powerful in an asymmetric one-shot game becomes more powerful in the repeated game, provided he or she values the future sufficiently more than the opponent. This contrasts with the view that repetition induces cooperation, but conforms with the expectation that a more patient player receives a larger share of the pie. (shrink)

Accounts of video game play developed from an ethnomethodological and conversation analytic perspective remain relatively scarce. This study collects together an emerging, if scattered, body of research which focuses on the material, practical “work” of video game players. The study offers an example-driven explication of an EMCA perspective on video game play phenomena. The materials are arranged as a “tactical zoom.” We start very much “outside” the game, beginning with a wide view of how massive-multiplayer online games are played (...) within dedicated gaming spaces; here, we find multiple players, machines, and many different sorts of activities going on. Still remaining somewhat distanced from the play of the game itself, we then take a closer look at the players themselves by examining a notionally simpler setting involving pairs taking part in a football game at a games console. As we draw closer to the technical details of play, we narrow our focus further still to examine a player and spectator situated “at the screen” but jointly analyzing play as the player competes in an online first-person shooter. Finally, we go “inside” the game entirely and look at the conduct of avatars on-screen via screen recordings of a massively multiplayer online game. Having worked through specific examples, we provide an elaboration of a selection of core topics of ethnomethodology and conversation analysis that is used to situate some of the unstated orientations in the presentation of data fragments. In this way, recurrent issues raised in the fragments are shown as coherent, interconnected phenomena. In closing, we suggest caution regarding the way game play phenomena have been analyzed in this study, while remarking on challenges present for the development of further EMCA-oriented research on video game play. (shrink)

We present a game semantics in the style of Lorenzen for Girard's linear logic . Lorenzen suggested that the meaning of a proposition should be specified by telling how to conduct a debate between a proponent P who asserts and an opponent O who denies . Thus propositions are interpreted as games, connectives as operations on games, and validity as existence of a winning strategy for P. We propose that the connectives of linear logic can be naturally interpreted (...) as the operations on games introduced for entirely different purposes by Blass . We show that affine logic, i.e., linear logic plus the rule of weakening, is sound for this interpretation. We also obtain a completeness theorem for the additive fragment of affine logic, but we show that completeness fails for the multiplicative fragment. On the other hand, for the multiplicative fragment, we obtain a simple characterization of game-semantical validity in terms of classical tautologies. An analysis of the failure of completeness for the multiplicative fragment leads to the conclusion that the game interpretation of the connective is weaker than the interpretation implicit in Girard's proof rules; we discuss the differences between the two interpretations and their relative advantages and disadvantages. Finally, we discuss how Gödel's Dialectica interpretation , which was connected to linear logic by de Paiva , fits with game semantics. (shrink)

Accounts of video game play developed from an ethnomethodological and conversation analytic perspective remain relatively scarce. This study collects together an emerging, if scattered, body of research which focuses on the material, practical “work” of video game players. The study offers an example-driven explication of an EMCA perspective on video game play phenomena. The materials are arranged as a “tactical zoom.” We start very much “outside” the game, beginning with a wide view of how massive-multiplayer online games are played (...) within dedicated gaming spaces; here, we find multiple players, machines, and many different sorts of activities going on. Still remaining somewhat distanced from the play of the game itself, we then take a closer look at the players themselves by examining a notionally simpler setting involving pairs taking part in a football game at a games console. As we draw closer to the technical details of play, we narrow our focus further still to examine a player and spectator situated “at the screen” but jointly analyzing play as the player competes in an online first-person shooter. Finally, we go “inside” the game entirely and look at the conduct of avatars on-screen via screen recordings of a massively multiplayer online game. Having worked through specific examples, we provide an elaboration of a selection of core topics of ethnomethodology and conversation analysis that is used to situate some of the unstated orientations in the presentation of data fragments. In this way, recurrent issues raised in the fragments are shown as coherent, interconnected phenomena. In closing, we suggest caution regarding the way game play phenomena have been analyzed in this study, while remarking on challenges present for the development of further EMCA-oriented research on video game play. (shrink)

We propose a formal framework for interpretable machine learning. Combining elements from statistical learning, causal interventionism, and decision theory, we design an idealisedexplanation gamein which players collaborate to find the best explanation(s) for a given algorithmic prediction. Through an iterative procedure of questions and answers, the players establish a three-dimensional Pareto frontier that describes the optimal trade-offs between explanatory accuracy, simplicity, and relevance. Multiple rounds are played at different levels of abstraction, allowing the players to explore overlapping causal patterns (...) of variable granularity and scope. We characterise the conditions under which such a game is almost surely guaranteed to converge on a (conditionally) optimal explanation surface in polynomial time, and highlight obstacles that will tend to prevent the players from advancing beyond certain explanatory thresholds. The game serves a descriptive and a normative function, establishing a conceptual space in which to analyse and compare existing proposals, as well as design new and improved solutions. (shrink)

Although previous studies have found that video games induce stress, studies have not typically measured all salient indicators of stress responses including stress appraisals, cardiovascular indicators, and emotion outcomes. The current study used the Biopsychosocial Model of Challenge and Threat (Blascovich & Tomaka, 1996) to determine if video games induce a cardiovascular stress response by comparing the effects of threat and challenge appraisals across two types of video games that have shown different cardiovascular outcomes. Participants received challenge (...) or threat appraisal instructions, and played a fighting game (Mortal Kombat) or a puzzle game (Tetris). Study outcomes were heart rate variability, systolic and diastolic blood pressure, and positive and negative emotion ratings measured before, during and after gameplay. Results indicated that threat appraisal instructions increased negative emotion ratings and decreased heart rate variability, but not blood pressure, which is an essential marker for cardiovascular stress responses. Increased blood pressure and decreased heart rate variability was associated with fighting game players when compared with the puzzle game players, indicating a cardiovascular stress response; however, fighting game players also reported higher positive emotion ratings. Based on the study findings, video games do not induce stress responses like mental stressors used in previous research, demonstrating that the interactive player experience in video gaming may have more complex effects on stress outcomes. Future research should comprehensively measure biopsychosocial stress indicators and multiple emotional states over time to fully examine the relationship between video games and stress. (shrink)

As a common social network, the SNEM plays an important role in emergency management. Magnitude emergencies are characterized by high complexity and uncertainty, and it is impossible to rely on the government for emergency management alone. We should absorb multiple subjects to build the SNEM and carry out extensive emergency mobilization in the whole society. The SNEM can integrate resources, gather consensus, promote participation, and reduce risks. The analysis of the types, generation mechanism, subject behavior, and strategy selection of (...) the SNEM aid in adopting appropriate mobilization strategy based on magnitude emergencies, achieving the adaptation of the SNEM and emergency scenarios. By constructing the evolutionary game model of the SNEM for magnitude emergencies, taking China as an empirical sample, this paper explores the behavior evolution law and stable strategy of the government, social organizations, and the public. The results showed that the symbiotic SNEM with a positive response of social organizations and the public under the path of high-intensity mobilization by the government is the best strategy combination, and it is conducive to maximizing the emergency joint force. (shrink)

Individual rationality, or doing what is best for oneself, is a standard model used to explain and predict human behavior, and von Neumann–Morgenstern game theory is the classical mathematical formalization of this theory in multiple-agent settings. Individual rationality, however, is an inadequate model for the synthesis of artificial social systems where cooperation is essential, since it does not permit the accommodation of group interests other than as aggregations of individual interests. Satisficing game theory is based upon a well-defined notion (...) of being good enough, and does accommodate group as well as individual interests through the use of conditional preference relationships, whereby a decision maker is able to adjust its preferences as a function of the preferences, and not just the options, of others. This new theory is offered as an alternative paradigm to construct artificial societies that are capable of complex behavior that goes beyond exclusive self interest. (shrink)

Wittgenstein did not claim that the ordinary language concept ‘game’ cannot be defined: he claimed that there are multiple definitions that can be adopted for special purposes, but no single definition applicable to all games. I will defend this interpretation of Wittgenstein’s position by showing its compatibility with a pragmatic argumentative view of definitions, and how this view accounts for the diversity of disagreeing game definitions in definitional disputes.

Various potential strategic interactions between a “strong” Artificial intelligence and humans are analyzed using simple 2 × 2 order games, drawing on the New Periodic Table of those games developed by Robinson and Goforth. Strong risk aversion on the part of the human player leads to shutting down the AI research program, but alternative preference orderings by the human and the AI result in Nash equilibria with interesting properties. Some of the AI-Human games have multiple equilibria, (...) and in other cases Pareto-improvement over the Nash equilibrium could be attained if the AI’s behavior towards humans could be guaranteed to be benign. The preferences of a superintelligent AI cannot be known in advance, but speculation is possible as to its ranking of alternative states of the world, and how it might assimilate the accumulated wisdom of humanity. (shrink)

Over the last 25 years, evolutionary game theory has grown with theoretical contributions from the disciplines of mathematics, economics, computer science and biology. It is now ripe for applications. In this book, Daniel Friedman---an economist trained in mathematics---and Barry Sinervo---a biologist trained in mathematics---offer the first unified account of evolutionary game theory aimed at applied researchers. They show how to use a single set of tools to build useful models for three different worlds: the natural world studied by biologists; the (...) social world studied by anthropologists, economists, political scientists and others; and the virtual world built by computer scientists and engineers. The first six chapters offer an accessible introduction to core concepts of evolutionary game theory. These include fitness, replicator dynamics, sexual dynamics, memes and genes, single and multiple population games, Nash equilibrium and evolutionarily stable states, noisy best response and other adaptive processes, the Price equation, and cellular automata. The material connects evolutionary game theory with classic population genetic models, and also with classical game theory. Notably, these chapters also show how to estimate payoff and choice parameters from the data. The last eight chapters present exemplary game theory applications. These include a new coevolutionary predator-prey learning model extending rock-paper-scissors; models that use human subject laboratory data to estimate learning dynamics; new approaches to plastic strategies and life cycle strategies, including estimates for male elephant seals; a comparison of machine learning techniques for preserving diversity to those seen in the natural world; analyses of congestion in traffic networks and the. (shrink)

Pragmatic encroachment theories have a problem with evidence. On the one hand, the arguments that knowledge is interest-relative look like they will generalise to show that evidence too is interest-relative. On the other hand, our best story of how interests affect knowledge presupposes an interest-invariant notion of evidence. -/- The aim of this paper is to sketch a theory of evidence that is interest-relative, but which allows that ‘best story’ to go through with minimal changes. The core idea is that (...) the evidence someone has is just what evidence a radical interpreter says they have. And a radical interpreter is playing a kind of game with the person they are interpreting. The cases that pose problems for pragmatic encroachment theorists generate fascinating games between the interpreter and the interpretee. They are games with multiple equilibria. To resolve them we need to detour into the theory of equilibrium selection. I’ll argue that the theory we need is the theory of risk-dominant equilibria. That theory will tell us how the interpreter will play the game, which in turn will tell us what evidence the person has. The evidence will be interest-relative, because what the equilibrium of the game is will be interest-relative. But it will not undermine the story we tell about how interests usually affect knowledge. (shrink)

. This paper reports the preliminary results from a semester-long ethics project at an AACSB accredited, regional comprehensive undergraduate school. This project culminated in an Ethics Awareness Week, which highlight a case study of the controversial EverQuest® multi-player online game. Issues of project planning and design are outlined, the dynamics of a business program-wide approach to ethics are social responsibility are presented, student survey results are presented and analyzed, and issues related to ongoing research are discussed. Nonparametric survey results indicate (...) that the greatest effect in student’s self reported enhanced understanding and interest in issues of business ethics is present when multiple pedagogical methods, e.g., case studies, lectures, assignments, and an Oxford-style debate, are applied by a number of faculty members over an extended time period. The paper concludes with a discussion of future research issues as well as a series of prescriptions for planning, organizing, and implementing such an extended activity. (shrink)

Commercial video games are popular entertainment media and part of students’ media reality. While commercial video games’ main purpose is not learning, they nonetheless could and should serve as objects of reflection in formal educational settings. Teachers could guide student learning and reflection as well as motivate students with commercial video games, but more evidence from formal educational settings is required. We conducted two mixed methods case studies to investigate students’ reflection processes using commercial video games (...) in regular formal high school teaching. In a double lesson, 29 students of a 10th-grade biology course and 17 students of a 12th-grade advanced course on history played and discussed a commercial video game related to the current curricular topic. We examined the reflection processes of students in terms of their reactions to the teachers’ game-related statements and questions. Regarding teachers’ statements, students discussed several topics related to game enjoyment and the games’ representation of topic-related content. Regarding teachers’ questions, students discussed multiple goals in each game, how the games represented topic-related content, and how the games could be appropriate for learning. In Study 2, students additionally discussed emotions, stereotypes, violence, and the narrative related to the digital history game. We found that the discussions provided students opportunities to reflect on their game experiences and the current curricular topic as well as to practice media criticism. We further provide quantitative results on students’ perceived topic knowledge, on several facets of their learning motivation, and on their acceptance of video games. Overall, our findings illustrate the educational value of using commercial video games as objects of reflection. (shrink)

The perceptual-cognitive ability to track multiple moving objects and its contribution to team sports performance has traditionally been studied in the laboratory under non-sports specific conditions. It is thus questionable whether the measured visual tracking performance and the underlying gaze activity reflected the actual ability of team sports players to track teammates and opponents on a real field. Using a Virtual Reality-based visual tracking task, the ability of participants to track multiple moving virtual players as they would do (...) on a soccer field was observed to pursue two objectives. See the influence of different scenario types on the visual tracking performance of soccer compared to non-soccer players. Observe the influence of spatial features of the simulated situations on gaze activity between soccer players and non-soccer players. The linear mixed model regression revealed a significant main effect of the group but no interaction effect between group and the type of trajectories, suggesting that the visual tracking ability of soccer players did not benefit from their specific knowledge when they faced scenarios with real game trajectories. Virtual players’ spatial dispersion and crowding affected the participants’ gaze activity and their visual tracking performance. Furthermore, the gaze activity of soccer players differed in some aspects from the gaze activity of non-soccer players. Assumptions are formulated as to the implication of these results in the difference in visual tracking performance between soccer players and non-soccer players. Overall, using soccer-specific trajectories might not be enough to replicate the representativeness of the field conditions in the study of visual tracking performance. Multitasking constraints should be considered along with motor-cognitive dual-tasks in future research to develop the representativeness of visual exploration conditions. (shrink)

According to Burri, a major reason why suicide is often irrational lies in the option value of life. Remaining alive is valuable because this allows for a larger menu of options, and the possibility of committing suicide in the future adds further value to the act of remaining alive now. In this note, I represent life as a trust game played by two selves – the young self and the old self – and I argue that the possibility to commit (...) suicide in the future can encourage committing suicide now, against what the theory of the option value of life predicts. (shrink)

The game theoretic notion of best-response reasoning is sometimes criticized when its application produces multiple solutions of games, some of which seem less compelling than others. The recent development of the theory of team reasoning addresses this by suggesting that interacting players in games may sometimes reason as members of a team – a group of individuals who act together in the attainment of some common goal. A number of properties have been suggested for team-reasoning decision-makers’ goals (...) to satisfy, but a few formal representations have been discussed. In this paper we suggest a possible representation of these goals based on the notion of mutual advantage. We propose a method for measuring extents of individual and mutual advantage to the interacting decision-makers, and define team interests as the attainment of outcomes associated with maximum mutual advantage in the games they play. (shrink)

I present a semantics for the language of first-order additive-multiplicative linear logic, i.e. the language of classical first-order logic with two sorts of disjunction and conjunction. The semantics allows us to capture intuitions often associated with linear logic or constructivism such as sentences = games, SENTENCES = resources or sentences = problems, where “truth” means existence of an effective winning strategy.The paper introduces a decidable first-order logic ET in the above language and gives a proof of its soundness and (...) completeness with respect to this semantics. Allowing noneffective strategies in the latter is shown to lead to classical logic.The semantics presented here is very similar to Blass's game semantics. Although there is no straightforward reduction between the two corresponding notions of validity, my completeness proof can likely be adapted to the logic induced by Blass's semantics to show its decidability, which was the main problem left open in Blass's paper.The reader needs to be familiar with classical logic and arithmetic. (shrink)

Video games have grown in number, variety, and consumer market penetration, encroaching more aggressively into the domestic realm. Within the home therefore, parents whose children play video games have to exercise mediation and supervision. As video games evolve, parental mediation strategies have also had to keep pace, albeit not always successfully. By transposing our appreciation of parental concerns over the historical development of video games, we propose an analytical framework identifying key affordances of video games, (...) elucidating how their evolution has distinct implications for effective parental mediation. These affordances are portability, accessibility, interactivity, identity multiplicity, sociability, and perpetuity. (shrink)

Why is it that most fictions present one and only one ending, rather than multiple ones? Fictions presenting multiple endings are possible, because a few exist; but they are very rare, and this calls for an explanation. We argue that such an explanation is likely to shed light on our engagement with fictions, for fictions having one and only one ending seem to be ubiquitous. After dismissing the most obvious explanations for this phenomenon, we compare the scarcity of (...) multiple endings in traditional kinds of fiction to their profusion in the case of interactive fictions. This contrast poses a challenge to accounts of our engagement with fictions in terms of games of make-believe. We conclude that solving this puzzle is likely to improve our philosophical understanding of fictions. (shrink)

This project assesses the ability of a game tutorial, “Goblin Threat” to increase university students’ ability to recognize plagiarized passages. The game tutorial covers information about how to cite properly, types and consequences of plagiarism, and the differences between paraphrasing and plagiarism. The game involves finding and clicking on “goblins” who ask questions about various aspects of plagiarism. Sound effects and entertaining visuals work to keep students’ attention. One group of 177 students enrolled in an online Psychology of Adolescence course (...) answered four multiple choice plagiarism recognition questions in the months after completing the online game tutorial while another group of over 400 students in the same online psychology course did not have access to the game tutorial, but answered the same multiple choice plagiarism recognition questions over the same period of time. The group who played the game tutorial showed an 11% improvement in recognizing plagiarized passages over the comparison group, a statistically significant difference. Results suggest the ability to keep students focused may be an important ingredient for plagiarism interventions. (shrink)

Game Transfer Phenomena refers to a cluster of involuntary phenomena related to playing videogames, including sensory and cognitive intrusions, transient changes in perception and self-agency. The Game Transfer Phenomena Scale has been used to measure the frequency of GTP with respect to five factors. The present study aimed to validate an instrument for assessing the multiple dimensions of GTP that helps clarify the distinction between GTP experiences. GTP were contextualized onto the spectrum of intrusive cognitions, perceptual distortions, and dissociations. (...) The relationship between GTP, involuntary phenomena without game content in terms of, e.g., hallucinations and perceptual distortions, and game-biased perceptions, as well as the positive and negative impact of GTP and level of distress were also examined. The data were collected using a survey. Separate confirmatory factor analyses of the dimensions of “inner intrusions/misperceptions,” “outer intrusions/distortions,” and “dissociations/mix-ups” produced acceptable fit indices. The findings show that phenomena manifesting as internal experiences are more common, while those manifesting as externalized intrusions are less common. Correlations between the GTP dimensions, INVWG, and GBPA, such as the insertion of game elements in thoughts, perceptions, and dreams, supported convergent validity. The correlations between the GTP dimensions and hours played supported criterion validity. Distress was correlated with outer intrusions and dissociations/mix-ups, but not with inner intrusions. Taken together, these results support the validity and reliability of the proposed assessment of GTP constructs. (shrink)

Background: Serious games have shown positive results in increasing motivation, adherence to treatment and strengthening the therapeutic alliance in multiple psychiatric disorders. In particular, patients with impulse control disorders and other disorders in which the patient suffers from inhibitory control deficits have been shown to benefit from serious games.Aim: The aim of this study was to describe the characteristics and to evaluate the usability of a new serious videogame, e-Estesia. This serious videogame was designed to improve emotion (...) regulation in patients with gambling disorder. Preliminary results from a pilot sample are also reported.Method: A pilot sample of 26 patients undergoing treatment for GD was recruited. Participants used e-Estesia on a tablet, which was connected to a thoracic band that sent heart rate and heart rate variability data to the videogame platform in order to provide biofeedback. The System Usability Scale was completed by patients to determine the usability of e-Estesia.Results and Discussion: e-Estesia performed comparatively well for all the explored groups. Around 84.6% of the patients endorsed that it was easy to use. Female patients with GD presented higher HRV during the use of the serious videogame compared to men. (shrink)

We consider motivations for acknowledging that people participate in multiple levels of economic agency. One of these levels is characterized in terms of subjective utility to the individual; another, frequently observed, level is characterized in terms of utility to social groups with which people identify. Following Bacharach, we describe such groups as ‘teams’. We review Bacharach’s theory of such identification in his account of ‘team reasoning’. While this conceptualization is useful, it applies only to processes supported by deliberation. As (...) this is only one of a range of causal mechanisms underlying behaviour by humans and other strategic agents, a more general account is desirable. We then argue that Stirling’s account of ‘conditional games’ achieves the desired generalization. (shrink)

This paper proposes that, in many cases, conversational norms permit gaslighting when socially subordinate speakers report systemic injustice. Section 1 introduces gaslighting and the kinds of cases on which I focus—namely, cases in which multiple people gaslight. I give examples and statistics to suggest that these cases are common in response to reports of race- or gender-based injustice; and I appeal to scholarship on epistemologies of ignorance to suggest that this kind of gaslighting is common because it is systematically (...) produced by dominant epistemic systems. Section 2 draws on Lynne Tirrell’s account of language games that’ve been influenced by oppression to make the case that conversational norms make gaslighting “appropriate” when socially subordinate speakers report systemic injustice. Together, these points make the case that the kind of gaslighting discussed in this paper (i) occurs systematically and (ii) is mutually reinforcing with systems of ignorance. The discussion is meant to help us understand and address the conditions that make gaslighting commonplace. If it’s true that gaslighting occurs systematically in part thanks to our warped conversational norms, then we may be able to mitigate the prevalence of gaslighting by attending to these norms. (shrink)

Women's games refers to a category of games developed and marketed exclusively for the consumption of women and girls in the Japanese gaming industry. Essentially gender-specific games comparable to the `games for girls' proposed by the girls' game movement in the USA, Japanese women's games are significant for their history, influence and function as a site for female gamers to play out various female identities and romantic fantasies within diverse generic structures. This article will first (...) review previous research and literature on women and gaming, analyze the key issues raised in the discourse concerning femininity and electronic games, outline the history and development of women's games, explain how multiple factors contributed to the appeal of women's games by analyzing the games Angelique and Harukanaru Tokino Nakade3 and, lastly, discuss the meaning and significance of women's games in the larger context of women and gaming. The 1994 game Angelique succeeded in establishing a loyal and close-knit fan base by actively utilizing popular female culture such as shoujo manga (girls' comics) and the fan base for voice actors. Angelique also set up the specifics and conventions of women's games: a focus on romance, easy controls and utilizing other multimedia. In 2004, Harukanaru Tokino Nakade3 deconstructed the genre and gender conventions of women's games and shoujo manga, while developing a new type of feminine identity and narrative. Women's games indicate that genderspecific games can be more than educational tools to familiarize girls with technology or perpetuate stereotypes; they can be a significant extension of female culture into the realm of gaming, and contribute to the development of women's culture and the diversification of the gaming industry. (shrink)

The post-truth condition is just as much about naming a meta-game as winning it. This condition can be tracked across Western intellectual history from the Homeric epics to popular culture. The common thread is that players are more likely to succeed in this meta-game if they have a certain consistency of character, which Thomas More called “integrity.” The presence of integrity means that the historical losers have often had an advantage in defining for subsequent generations the name of the game (...) because the steadfastness of their characters may make them be regarded as the agents of history, for better or worse. Further, naming the game tends to be stabilized by a variety of mental and material conditions, including “modal power”—control over what people think is and is not possible. Modal power is related to both Machiavellian politics and Kantian transcendentalism, and to the phenomenon of “truthiness.” The character of the post-truth player is epitomized by Thomas More, the “man for all seasons,” who remained consistent as he moved between multiple games, and ultimately to his execution. (shrink)

Steven Pinker proposes a game-theoretic framework to help explain the use of veiled speech in contexts where the ultimate aims of the speaker and hearer may diverge—such as cases of bribing a police officer to get out of a ticket and paying a maître d’ to get a table. This is presented as a response to what Pinker sees as the failure in H. P. Grice’s influential theory of meaning to recognize that speakers and hearers are not always cooperating. In (...) this paper I argue that Pinker mischaracterizes Grice’s views on cooperation, and use this to refine a positive picture of what sort of cooperation is demanded by Grice’s Cooperative Principle. This positive picture serves to insulate the Gricean framework from objectors—including Pinker—who overstate the obligations entailed by the adoption of the Cooperative Principle. I then argue that the cases Pinker presents are best treated by recognizing that in each instance the utterance is formulated with two intentions towards two different audiences and detail a resulting revision to Pinker’s game-theoretic framework that reflects this proposal. I conclude by demonstrating how this proposed game-theoretic framework of cooperation with multiple audiences can be used to model the costs and benefits of other types of discourse, including political speech. (shrink)

A cooperative game with transferable utility–or simply a TU-game– describes a situation in which players can obtain certain payoffs by cooperation. A value function for these games assigns to every TU-game a distribution of payoffs over the players. Well-known solutions for TU-games are the Shapley and the Banzhaf value. An alternative type of solution is the concept of share function, which assigns to every player in a TU-game its share in the worth of the grand coalition. In this (...) paper we consider TU-games in which the players are organized into a coalition structure being a finite partition of the set of players. The Shapley value has been generalized by Owen to TU-games in coalition structure. We redefine this value function as a share function and show that this solution satisfies the multiplication property that the share of a player in some coalition is equal to the product of the Shapley share of the coalition in a game between the coalitions and the Shapley share of the player in a game between the players within the coalition. Analogously we introduce a Banzhaf coalition structure share function. Application of these share functions to simple majority games show some appealing properties. (shrink)

Female leaders continue to face bias in the workplace compared to male leaders. When employees are evaluated differently because of who they are rather than how they perform, an ethical dilemma arises for leaders and organizations. Thus, bridging role congruity and social identity leadership theories, we propose that gender biases in leadership evaluations can be overcome by manipulating diversity at the team level. Across two multiple-source, multiple-wave, and randomized field experiments, we test whether team gender composition restores gender (...) equity in leadership evaluations. In Study 1, we find that male leaders are rated as more prototypical in male-dominated groups, an advantage that is eliminated in gender-balanced groups. In Study 2, we replicate and extend this finding by showing that leader gender and team gender composition interact to predict trust in the leader via perceptions of leader prototypicality. The results show causal support for the social identity model of organizational leadership and a boundary condition of role congruity theory. Beyond moral arguments of fairness, our findings also show how, in the case of gender, team diversity can create a more level playing field for leaders. Finally, we outline the implications of our results for leaders, organizations, business ethics, and society. (shrink)

According to the multiple realization argument, mental states or processes can be realized in diverse and heterogeneous physical systems; and that fact implies that mental state or process kinds cannot be identified with particular kinds of physical states or processes. More specifically, mental processes cannot be identified with brain processes. Moreover, the argument provides a general model for the autonomy of the special sciences. The multiple realization argument is widely influential, but over the last thirty years it has (...) also faced serious objections. Despite those objections, most philosophers regard the fact of multiple realization and the cogency of the multiple realization argument as plainly correct. Why is that? What is it about the multiple realization argument that makes it so resilient? One reason is that the multiple realization argument is deeply intertwined with a view that minds are, in some sense, computational. But we argue that the sense in which minds are computational does not support the conclusion that they are ipso facto multiply realized. We argue that the sense in which brains compute does not imply that brains implement multiply realizable computational processes, and it does not provide a general model for the autonomy of the special sciences. (shrink)

This article introduces a computational model which illustrates how a population of agents can coordinate a vocabulary for goal oriented behavior through repeated local interactions, called “Action Games”. Using principles of self organization and specific assumptions on their behavior, the agents learn the goals and a vocabulary for them. It is shown that the proposed model can be used to investigate the coordination of vocabularies for goal oriented behavior both in a vertical and in a horizontal transmission scheme. Furthermore, (...) it is shown that in this model shared vocabularies can only be learned from multiple demonstrations consisting of exactly these actions that are strictly required to reach the goal. Keywords: robot imitation; self organization; vocabularies. (shrink)

This article introduces a computational model which illustrates how a population of agents can coordinate a vocabulary for goal oriented behavior through repeated local interactions, called “Action Games”. Using principles of self organization and specific assumptions on their behavior, the agents learn the goals and a vocabulary for them. It is shown that the proposed model can be used to investigate the coordination of vocabularies for goal oriented behavior both in a vertical and in a horizontal transmission scheme. Furthermore, (...) it is shown that in this model shared vocabularies can only be learned from multiple demonstrations consisting of exactly these actions that are strictly required to reach the goal. Keywords: robot imitation; self organization; vocabularies. (shrink)