Philosophers have proposed accounts of shared intentions that aim at capturing what makes a joint action intentionally joint. On these accounts, having a shared intention typically presupposes cognitively and conceptually demanding theory of mind skills. Yet, young children engage in what appears to be intentional, cooperative joint action long before they master these skills. In this paper, I attempt to characterize a modest or ‘lite’ notion of shared intention, inspired by Michael Bacharach’s approach to (...) team–agency theory in terms of framing, group identification and team reasoning. I argue that the account of shared intentions this approach yields is less cognitively and conceptually demanding than other accounts and is thus applicable to the intentional joint actions performed by young children. I also argue that it has limitations of its own and that considering what these limitations are may help us understand why we sometimes need to take other routes to shared intentions. (shrink)

Given the premise that joint action plays some role in explaining how humans come to understand minds, what could joint action be? Not what a leading account, Michael Bratman's, says it is. For on that account engaging in joint action involves sharing intentions and sharing intentions requires much of the understanding of minds whose development is supposed to be explained by appeal to joint action. This paper therefore offers an account of a (...) different kind of joint action, an account compatible with the premise about development. The new account is no replacement for the leading account; rather the accounts characterise two kinds of joint action. Where the kind of joint characterised by the leading account involves shared intentions, the new account characterises a kind of joint action involving shared goals. (shrink)

In a series of essays, Bratman defines a concept, which we may call the concept of Bratmanian action by many. Our discussion of this concept, in section 1, reveals that it is not the one called to mind by the usual examples of joint action. Section 2 lays alongside it a different concept of doing something together. According to it, many are doing A together if and only if the principle of the actions in which they are (...) doing A is a joint intention to do A, an act of intending that is theirs. It seems fitting to call this joint intentional action. In distinction to Bratmanian action by many, joint intentional action is ubiquitous in human life. This raises the question what may be the interest of Bratman's concept. Its interest can reside only in a relation it bears to the concept of joint intentional action. Section 3 discusses the suggestion that Bratmanian action by many is a precursor of joint action in human phylogenesis. This is wrong because subjects are capable of Bratmanian action only in virtue of being subjects of joint action. (shrink)

After having identified several shortcomings of the so-called ‘standard accounts’ of shared intentions, this paper will develop a novel framework for understanding such intentions. The framework to be advanced hinges on a notion of ‘expression’, as well as on the claim that shared intentions are expressed—that is, manifested, grasped, shaped and clarified—throughout the unfolding of the joint actions they animate, as well as in the various expressive activities and behaviours that accompany joint action. This claim will be (...) defended with particular reference to the work of Charles Taylor on expression, as well as recent work on embodied cognition. (shrink)

University of Cologne, Germany Joint action and group agency have emerged as focuses of attention in recent social theory and philosophy but they have rarely been connected with one another. The argument of this article is that whereas joint action involves people acting together to achieve any sort of result, group agency requires them to act together for the achievement of one result in particular: the construction of a centre of attitude and agency that satisfies the (...) usual constraints of consistency and rationality in adequate measure. The main discovery in the recent theory of group agency is that this result is not easily achieved; no regular voting procedure will ensure, for example, that a group of individually consistent agents will display consistency in group judgments. Key Words: groups • group agents • collective agents • joint action • joint intention. (shrink)

Many philosophers have offered accounts of shared actions aimed at capturing what makes joint actions intentionally joint. I first discuss two leading accounts of shared intentions, proposed by Michael Bratman and Margaret Gilbert. I argue that Gilbert’s account imposes more normativity on shared intentions than is strictly needed and that Bratman’s account requires too much cognitive sophistication on the part of agents. I then turn to the team-agency theory developed by economists that I see as offering an alternative (...) route to shared intention. I concentrate on Michael Bacharach’s version of team-agency theory, according to which shared agency is a matter of team-reasoning, team-reasoning depends on group identification and group identification is the result of processes of self-framing. I argue that it can yield an account of shared intention that is less normatively loaded and less cognitively demanding. (shrink)

Leading philosophical accounts of joint activity, such as Michael Bratman’s account of ‘shared intentional activity’, take joint activity to be the outcome of two or more agents having a ‘shared intention’, where this is a certain pattern of mutually known prior intentions that are directed toward a common goal. With Bratman’s account as a foil, I address two lacunas that are relatively unexplored in the philosophical literature. The first lacuna concerns how to make sense of the apparently (...) joint cooperative activities of agents that lack the capacities for planning and “mindreading” that one must have in order to be a party to a shared intention. The second lacuna concerns how participants are able to coordinate their actions “online”—that is, during action execution as a joint activity unfolds—without recourse to plans that specify in advance what they should do. Chapters 2 and 3 focus on the first lacuna, while chapters 4 and 5 focus on the second. In chapter 2, I focus on why participants must have mutual or common knowledge of each other’s intentions and beliefs in order to have a shared intention: Why must these attitudes be “out in the open”? I argue that, if participants lack the concept of belief, then one of the two main motivations for the common knowledge requirement—to filter out certain cases that intuitively aren’t cases of genuine joint activity—actually dissipates. Furthermore, a kind of “openness” that only requires of participants that they have the concept of goal but not that of belief can satisfy the other main motivation, to make sense of the idea that joint activities are non-accidentally coordinated. In chapter 3, I offer an account of a kind of joint activity in which agents such as young children and some non-human primates could participate, given what we know about their socio-cognitive capacities. In chapter 4, I argue that ‘shared intention’-accounts are unable to say much about spontaneous or skilful joint action because of the following widely accepted constraint on what one can intend: while an agent might intend—in the sense of commit to a plan—that “we” do something together, an agent cannot intend to perform “our” joint action. I reject this constraint and argue that some joint actions are joint in virtue of each participant having what I call ‘socially extended intention-in-action’ that overlap. In chapter 5, I review empirical work on subpersonal enabling mechanisms for the coordination of joint action. The review provides clues to what it is that enables participants to successfully coordinate their actions in the absence of plan-like intentions or beyond what such intentions specify. While what I address are lacunas rather than problems, an upshot of this thesis is that leading philosophical accounts of joint activity may have less explanatory scope than one might otherwise be led to believe. The accounts of joint activity and joint action that are presented in this thesis are arguably applicable to many of the joint activities and joint actions of adult human beings. The account also helps us avoid the false dichotomy between a very robust form of joint activity and a mere concatenation of purely individualistic actions—a dichotomy that accounts such as Bratman’s arguably invite us to adopt. (shrink)

Numerous philosophical theories of joint agency and its intentional structure have been developed in the past few decades. These theories have offered accounts of joint agency that appeal to higher-level states that are?shared? in some way. These accounts have enhanced our understanding of joint agency, yet there are a number of lower-level cognitive phenomena involved in joint action that philosophers rarely acknowledge. In particular, empirical research in cognitive science has revealed that when individuals engage (...) in a joint activity such as conversation or joint problem solving, they become aligned at multiple levels. We argue that this phenomenon of alignment is crucial to understanding joint actions and should be integrated with philosophical approaches. In this paper, we sketch a possible integration, and draw out its implications for understanding of joint agency and collective intentionality. The result is a process-based, dynamic account of joint action that integrates both low-level and high-level states, and seeks to capture the separate processes of how a joint action is initiated and sustained. (shrink)

In recent years, several minimalist accounts of joint action have been offered (e.g. Tollefsen Philosophy of the Social Sciences 35:75–97, 2005; Sebanz et al. Journal of Experimental Psychology: Human Perception and Performance, 31(6): 234–1246, 2006; Vesper et al. Neural Networks 23 (8/9): 998–1003, 2010), which seek to address some of the shortcomings of classical accounts. Minimalist accounts seek to reduce the cognitive complexity demanded by classical accounts either by leaving out shared intentions or by characterizing them in a (...) way that does not demand common knowledge of complex, interconnected structures of intentions. Moreover, they propose models of the actual factors facilitating online coordination of movements. The present proposal aims to enrich a minimalist framework by showing how shared emotions can facilitate coordination without presupposing common knowledge of complex, interconnected structures of intentions. Shared emotions are defined for the purposes of this paper as affective states that fulfill two minimal criteria: (a) they are expressed (verbally or otherwise) by one person; and (b) the expression is perceived (consciously or unconsciously) by another person. Various ways in which the fulfillment of (a) and (b) can lead to effects that function as coordinating factors in joint action are distinguished and discussed. (shrink)

In this paper, I argue that joint action permits a certain degree of luck. The cases I have in mind exhibit the following structure: each participant believes that the intended ends of each robustly support the joint action. This belief turns out to be false. Due to lucky circumstances, the discordance in intention never becomes common knowledge. However, common knowledge of the relevant intentions would have undermined the joint action altogether. The analysis of such (...) cases shows the extent to which common knowledge of the participants’ intentions can be harmful to joint action. This extends a recent line of research that has questioned the necessity of common knowledge in joint action. (shrink)

Drawing on recent findings in the cognitive and neurosciences, this article discusses how people manage to predict each other’s actions, which is fundamental for joint action. We explore how a common coding of perceived and performed actions may allow actors to predict the what, when, and where of others’ actions. The “what” aspect refers to predictions about the kind of action the other will perform and to the intention that drives the action. The “when” aspect is (...) critical for all joint actions requiring close temporal coordination. The “where” aspect is important for the online coordination of actions because actors need to effectively distribute a common space. We argue that although common coding of perceived and performed actions alone is not sufficient to enable one to engage in joint action, it provides a representational platform for integrating the actions of self and other. The final part of the paper considers links between lower‐level processes like action simulation and higher‐level processes like verbal communication and mental state attribution that have previously been at the focus of joint action research. (shrink)

The paper argues that there are two main kinds of joint action, direct joint bringing about (or performing) something (expressed in terms of a DO-operator) and jointly seeing to it that something is the case (expressed in terms of a Stit-operator). The former kind of joint action contains conjunctive, disjunctive and sequential action and its central subkinds. While joint seeing to it that something is the case is argued to be necessarily intentional, (...) direct joint performance can also be nonintentional. Actions performed by social groups are analyzed in terms of the notions of joint action (basically DO and Stit).A precise semantical analysis of the aforementioned kinds of joint action is given in terms of time-trees. With each participant a tree is connected, and the trees are joined defining joint possible worlds in terms of state-expressing nodes from the trees. Sentences containing DO and Stit are semantically evaluated with respect to such joint possible worlds. Intentional joint actions are characterized in terms of the notion of we-intention (joint intention), characterized formally by means of a special operator. (shrink)

Intuitively, even very young children can act jointly. For instance, a child and her parent can build a simple tower together. According to developmental psychologists, young children develop theory of mind by, among other things, participating in joint actions like this. Yet many leading philosophical accounts of joint action presuppose that participants have a robust theory of mind. In this article, I examine two philosophical accounts of joint action designed to circumvent this presupposition, and then (...) I proffer my own novel account of what makes (at least some) interactions between very young children and others joint. I argue that children can take up without deliberation intentions with a joint content that have been transmitted to them by others. In doing so, children can come to share intentions with others, and by acting on these shared intentions they can come to act jointly, all without employing a robust theory of mind. (shrink)

Raimo Tuomela has a good deal to say about the we-mode and the I-mode in relation to joint actions and related phenomena. Moreover, he also invoked the notion of a pro-group I-mode. However, it is not always entirely clear what the basis of these distinctions is and whether, ultimately, the distinction between the we-mode and the pro-group I-mode can be satisfactorily made out. If not then, since pro-group I-mode is a species of I-mode, the fundamental distinction between we-mode and (...) I-mode is called into question. In this paper, firstly, I explore these distinctions and Raimo Tuomela’s understanding of them. Secondly, I contrast Tuomela’s conception with my own strict individualist I-mode account and argue inter alia that since the notion of we-mode (at least as articulated by Tuomela) cannot satisfactorily be distinguished from a pro-group I-mode then to this extent and contra Tuomela we should prefer an account of collective intentions and related we-mode phenomena, including so-called we-reasons, purely in terms of I-mode and, therefore, in strict individualist terms. (shrink)

Joint action is central to countless aspects of human life. Here I examine the roots of joint action in infancy. First, I provide evidence that—contrary to popular belief—1‐year‐old infants do have the social‐cognitive prerequisites needed to participate in joint action, even in a relatively strict sense: they can read others’ goals and intentions, they have some basic understanding of common knowledge, and they have the ability and motivation to help others achieve their goals. Then (...) I review some evidence of infants’ and young children’s active participation in different types of joint action, from prelinguistic communication to more instrumental collaborations with others, with a particular focus on whether young children show evidence of an understanding of the commitments and obligations entailed in joint action. I conclude that the uniquely human ability and motivation to participate in joint action is already seen in infants by 1 year of age. (shrink)

In this paper, we investigate the role of intention and joint attention in joint actions. Depending on the shared intentions the agents have, we distinguish between joint path-goal actions and joint final-goal actions. We propose an instrumental account of basic joint action analogous to a concept of basic action and argue that intentional joint attention is a basic joint action. Furthermore, we discuss the functional role of intentional (...) class='Hi'>joint attention for successful cooperation in complex joint actions. Anika Fiebich is PhD student in Philosophy at the Ruhr-University Bochum, Germany. Shaun Gallagher is Lilian and Morrie Moss Professor of Philosophy at the University of Memphis, USA. (shrink)

There are two general views that social ontologists currently defend concerning the nature of joint intentional action. According to ‘non-normativists’, for a joint action to be established, we need to align certain psychological states in certain ways. ‘Normativists’ argue that joint action essentially involves normative relations that cannot be reduced to the intentional states of individuals. In two ground-breaking publications, Javier Gomez-Lavin and Matthew Rachar empirically investigate the relation between normativity and (...) class='Hi'>joint action in several survey studies. They argue that people's intuitions support neither current normativists nor current non-normativists. They suggest that there is a need for a ‘new normativism of joint action’. I first explore what a new normativism could amount to and conclude that the authors’ findings cannot support a demand for such a view. Finally, I suggest some ideas about how to move the field forward. (shrink)

The debate regarding the nature of joint action has come to a stalemate due to a dependence on intuitional methods. Normativists, such as Margaret Gilbert, argue that action-relative normative relations are inherent in joint action, while non-normativists, such as Michael Bratman, claim that there are minimal cases of joint action without normative relations. In this work, we describe the first experimental examinations of these intuitions, and report the results of six studies that weigh (...) in favor of the normativist paradigm. Philosophical ramifications and further extensions of this work are then discussed. (shrink)

This paper introduces freely improvised joint actions, a class of joint actions characterized by highly unspecific goals and the unavailability of shared plans. For example, walking together just for the sake of walking together with no specific destination or path in mind provides an ordinary example of FIJAs, along with examples in the arts, e.g., collective free improvisation in music, improv theater, or contact improvisation in dance. We argue that classic philosophical accounts of joint action such (...) as Bratman’s rule them out because the latter require a capacity for planning that is idle in the case of FIJAs. This argument is structurally similar to arguments for minimalist accounts of joint action, and this invites a parallel minimalist account, which we provide in terms of a specific kind of shared intentions that do not require plan states. We further argue that the resulting minimalist account is different in kind from the sort of minimalism suggested by developmental considerations and conclude in favor of a pluralistic minimalism, according to which there are several ways for an account of joint action to be minimal. (shrink)

It is sometimes claimed that Gricean communication is necessarily a form of cooperative or ‘joint’ action. A consequence of this Cooperative Communication View is that Gricean communication could not itself contribute to an explanation of the possibility of joint action. I argue that even though Gricean communication is often a form of joint action, it is not necessarily so—since it does not always require intentional action on the part of a hearer. Rejecting (...) the Cooperative Communication View has attractive consequences for our theorising about human cognitive development, since it opens up the possibility of appealing to communicative interaction to explain the emergence of joint action in phylogeny. (shrink)

Shared intention normally leads to joint action. It does this, it is commonly said, only because it is a characteristically stable phenomenon, a phenomenon that tends to persist from the time it is formed until the time it is fulfilled. However, the issue of what the stability of shared intention comes down to remains largely undertheorized. My aim in this paper is to remedy this shortcoming. I argue that shared intention is a source of moral and epistemic reasons, (...) that responsiveness to such reasons on the part of each individual reinforces her own relevant attitudes, and that this enhances the stability of the shared intention as a whole. We thus discover an important self-reinforcing and stability-enhancing mechanism at the heart of shared intention and action. It follows from this proposal that the psychological commitment that an individual exhibits in joint action is normally a function not only of her own participatory intention, as often maintained, but also of her endorsement of the reasons created by her group’s shared intention to so act. (shrink)

This paper argues that the intentional actions of collective entities, such as corporations and agencies, are not necessarily joint intentional actions by several members of those collectives. I briefly summarize the social action theories of John Searle, Michael Bratman, Margaret Gilbert, Raimo Tuomela, and Seumas Miller, which I argue are all theories of joint action. I then describe a case based loosely on events from the 2008 financial crisis in which an intentional collective (...) action is performed by a corporation due to the actions of two employees who have no knowledge of one another, and therefore cannot be engaged in a joint intentional action. I argue that this shows that, contrary to what joint action theorists are committed to, every intentional collective action does not entail the existence of a joint intentional action. Finally, I suggest that we should look for a weaker notion of coordination than that employed by joint action theories, and that this might be provided by examining the command structures of organizations. (shrink)

Joint action, critical to human social interaction and communication, has garnered increasing scholarly attention in many areas of inquiry, yet its development remains little explored. This paper reviews research on the growth of joint action over the first 2 years of life to show how children become progressively more able to engage deliberately, autonomously, and flexibly in joint action with adults and peers. It is suggested that a key mechanism underlying the dramatic changes in (...) joint action over the second year of life is the ability to reflect consciously on oneself and one’s behavior and volition and correspondingly, on the behavior, goals, and intentions of others. (shrink)

According to many, joint intentional action must be understood in terms of joint intentions. Most accounts of joint intention appeal to a set of sophisticated individual intentional states. The author argues that standard accounts of joint intention exclude the possibility of joint action in young children because they presuppose that the participants have a robust theory of mind, something young children lack. But young children do engage in joint action. (...) The author offers a revision of Michael Bratman’s analysis of joint intention that reflects the socio-cognitive abilities young children do have. This revision makes sense of joint action among young children and equally well explains simple joint actions involving adults. Key Words: collective intentionality • joint action • child’s theory of mind • joint attention. (shrink)

Joint action is a growing field of research, spanning across the cognitive, behavioral, and brain sciences as well as receiving considerable attention amongst philosophers. I argue that there has been a significant oversight within this field concerning the possibility that many joint actions are driven, at least in part, by agents' social motivations rather than merely by their shared intentions. Social motivations are not directly related to the (joint) target goal of the action. Instead, when (...) agents are mutually socially motivated in joint action this is because they find acting with others rewarding in its own right. Moreover the involvement of social motivation in joint action typically enables individuals to achieve the long-term benefits associated with being part of a social bond. I argue that taking social motivations into account better prepares us for explaining a broader range of joint actions, including those that are of an antagonistic, competitive, or explorative character. Finally, I show that recognizing the importance of social motivations entails that joint actions (in general) should be understood as having the two primary functions of (1) achieving the intended target outcome of an action, and (2) attaining the benefits related to being part of a social bond. (shrink)

Some of the reasons one acts on in joint action are shared with fellow participants. But others are proprietary: reasons of one’s own that have no direct practical significance for other participants. The compatibility of joint action with proprietary reasons serves to distinguish the former from other forms of collective agency; moreover, it is arguably a desirable feature of joint action. Advocates of “team reasoning” link the special collective intention individual participants have when acting (...) together with a distinctive form of practical reasoning that purports to put individuals in touch with group or collective reasons. Such views entail the surprising conclusion that one cannot engage in joint action for proprietary reasons. Suppose we understand the contrast between minimal and robust forms of joint action in terms of the extent to which participants act on proprietary reasons as opposed to shared reasons. Then, if the team reasoning view of joint intention and action is correct, it makes no sense to talk of minimal joint action. As soon as the reason for which one participates is proprietary, then one is not, on this view, genuinely engaged in joint action. (shrink)

Joint attention is an everyday phenomenon in which two or more individuals attend to an object, event process or property in the presence of each other, such that their attention to that object is to some degree intertwined with the other’s attention to it. This paper argues that joint attention has the normative role of enabling subjects to coordinate their actions in a way that would contribute to the rational execution of a joint action in accordance (...) with a prior shared plan or shared intention. This understanding of the normative function of joint attention underpins a particular understanding of the nature of joint attention: what I shall call Rich Relationalism. Rich Relationalism argues for the view that joint attention acts as an epistemically significant interface between the world, other people, and their background plans and concepts. It understands joint attention as an object-dependent, conceptually structured, token experiential state that is shared by two (or more) people. It can be contrasted with non-relational (i.e., Representational or Enactivist) accounts of joint attention on the one hand, and Lean Relationalist accounts on the other (such as John Campbell’s influential account). (shrink)

Joining insights from social science and philosophy, this book offers a nuanced view on the discourse of evil, which has been on the rise in the West in recent years. Exploring the famous 'Pear Theft' episode in St Augustine's Confessions, it looks beyond the theological implications of the event to focus instead on the secular insights that it offers when the event is placed in the context of social thought. With attention to Augustine's lengthy reflections on a seemingly marginal episode, (...) the author contends that it is possible to discern the elements of a convincing account of intentional evil action, the Pear Theft representing a case of joint radical improvisation that lacks collective deliberation. As such, a new perspective emerges on familiar and more intuitive forms of evil in joint action that involve group identification and institutional action. Evil in Joint Action will appeal to scholars of sociology, social theory and philosophy with interests in ethics, collective action and concepts of evil. (shrink)

According to a widely accepted constraint on the content of intentions, here called the exclusivity constraint, one cannot intend to perform another agent’s action, even if one might be able to intend that she performs it. For example, while one can intend that one’s guest leaves before midnight, one cannot intend to perform her act of leaving. However, Deborah Tollefsen’s (2005) account of joint activity requires participants to have intentions-in-action (in John Searle’s (1983) sense) that violate this (...) constraint. I argue that the exclusivity constraint should not be accepted as an unconditional constraint on the contents of intentions-in-action: one may intend to perform a basic action that belongs both to oneself and to another agent. Based on the phenomenology of tool use, I first argue that intentions-in-action of one’s basic actions may be technologically extended, meaning that their contents are not restricted to concern the agent’s bodily movements. In analogy with this, I then argue that the phenomenology of some skillful joint activities supports the idea that one’s basic intentions-in-action may be socially extended, in violation of the widely accepted exclusivity constraint. Tollefsen’s account is specifically constructed to account for the joint activities of infants and toddlers who lack the capacity to think of others as planning agents and grasp their plan-like intentions (a capacity required by Michael Bratman’s (1992, 1993, 2009a, b) influential account of joint activity). At the end of the paper, I raise some doubts regarding the extent to which infants and toddlers have socially extended intentions-in-action. (shrink)

Joint actions typically involve a sense of togetherness that has a distinctive phenomenological component. While it has been hypothesized that group size, hierarchical structure, division of labour, and expertise impact agents’ phenomenology during joint actions, the studies conducted so far have mostly involved dyads performing simple actions. We explore in this study the complex case of collectively improvised musical performances, focusing particularly on the way group size and interactional patterns modulate the phenomenology of joint action. We (...) recorded two expert improvisation ensembles of contrasting sizes (16 vs 4 musicians) and collected data about their musical behaviour, as well as reports about five aspects of their phenomenology (sense of agency, agentive identity, integration, dependence, reflexivity) and about their musical intentions. Our overall data enabled us to assess how those five phenomenological dimensions related to one another during jointly improvised performances. They also show how such phenomenology varied with the way improvisers dynamically related to one another throughout the performance. Finally, we observe that group size strongly altered the phenomenology of improvisers who otherwise shared many characteristics (high expertise, similar aesthetic preferences, etc.). Our study thus sheds light on the interactional and structural parameters that shape and modulate our felt experience when acting together, and thereby highlights the importance of pluralism for studying the phenomenology of joint action. (shrink)

Important work on alignment systems has been applied to philosophical work on joint action by Tollefsen and Dale. This paper builds from and expands on their work. The first aim of the paper is to spell out how the empirical research on alignment may be integrated into philosophical theories of joint action. The second aim is then to develop a successful characterization of joint action, which spells out the difference between genuine joint (...) class='Hi'>action and simpler forms of coordination based on alignment. I begin by introducing the empirical research and two definitions of joint action. I then argue that instead of using this research in conjunction with Searle’s account of collective intentionality, as Tollefsen and Dale suggest, we would be better served by applying this research to Gilbert’s account of plural subjects. In the final sections I distinguish between alignment, coordination, and joint action, clarify the roles of joint commitment and sub-personal alignment in joint action, and argue that... (shrink)

I identify two kinds of failure in joint action. First, we can fail to ‘do our part’, that is, fail to contribute to fulfilling the joint intention. Second, we can fail to respect our collaborators. Recognizing the distinct natures of both normative relations helps us overcome a key challenge to a reductionist theory of collective intentionality posed by Margaret Gilbert. According to this objection, we have obligations towards others even in immoral joint actions – a claim (...) that was recently supported experimentally. Except for a handful of experimental papers, work on the normativity in joint intention has stagnated. I hope the distinction breathes fresh air into the theoretical and empirical debate. (shrink)

What is required for several agents to intentionally φ together? I argue that each of them must believe or assume that their φ-ing is a single end that each intends to contribute to. Various analogies between intentional singular action and intentional joint action show that this doxastic single end condition captures a feature at the very heart of the phenomenon of intentional joint action. For instance, just as several simple actions are only (...) unified into a complex intentional singular activity if the agent believes or assumes that there is a single end that each action is directed to, so several agents’ actions are only unified into an intentional joint activity if each agent believes or assumes that there is a single end that each intends to contribute to. Influential accounts of intentional joint action, including Christopher Kutz’s and Michael Bratman’s, implicitly include this condition only if participants must intend to contribute to the end under the same conception. While such a requirement successfully rules out some counterexamples, it also makes the accounts unable to appropriately accommodate and explain clear cases of intentional joint action that they ought to be able to accommodate and explain. (shrink)

Language use can be viewed as a form of joint activity that requires the coordination of meaning between individuals. Because the linguistic signal is notoriously ambiguous, interlocutors need to draw upon additional sources of information to resolve ambiguity and achieve shared understanding. One way individuals can achieve coordination is by using inferences about the interlocutor’s intentions and mental states to adapt their behavior. However, such an inferential process can be demanding in terms of both time and cognitive resources. Here, (...) we suggest that interaction provides interlocutors with many cues that can support coordination of meaning, even when they are neither produced intentionally for that purpose nor interpreted as signaling speakers’ intention. In many circumstances, interlocutors can take advantage of these cues to adapt their behavior in ways that promote coordination, bypassing the need to resort to deliberative inferential processes. (shrink)

The sense of agency – the subjective feeling of being in control of our own actions – is one central aspect of the phenomenology of action. Computational models provided important contributions toward unveiling the mechanisms underlying the sense of agency in individual action. In particular, the sense of agency is believed to be related to the match between the actual and predicted consequences of our own actions (comparator model). In the study of joint action, models are (...) even more necessary to understand the mechanisms underlying the development of coordination strategies and how the subjective experiences of control emerge during the interaction. In a joint action, we not only need to predict the consequences of our own actions; we also need to predict the actions and intentions of our partner, and to integrate these predictions to infer their joint consequences. Understanding our partner and developing mutually satisfactory coordination strategies are key components of joint action and in the development of the sense of joint agency. Here we discuss a computational architecture which addresses the sense of agency during intentional, real-time joint action. We first reformulate previous accounts of the sense of agency in probabilistic terms, as the combination of prior beliefs about the action goals and constraints, and the likelihood of the predicted movement outcomes. To look at the sense of joint agency, we extend classical computational motor control concepts - optimal estimation and optimal control. Regarding estimation, we argue that in joint action the players not only need to predict the consequences of their own actions, but also need to predict partner’s actions and intentions (a ‘partner model’) and to integrate these predictions to infer their joint consequences. As regards action selection, we use differential game theory – in which actions develop in continuous space and time - to formulate the problem of establishing a stable form of coordination and as a natural extension of optimal control to joint action. The resulting model posits two concurrent observer-controller loops, accounting for ‘joint’ and ‘self’ action control. The two observers quantify the likelihoods of being in control alone or jointly. Combined with prior beliefs, they provide weighing signals which are used to modulate the ‘joint’ and ‘self’ motor commands. We argue that these signals can be interpreted as the subjective sense of joint and self agency. We demonstrate the model predictions by simulating a sensorimotor interactive task where two players are mechanically coupled and are instructed to perform planar movements to reach a shared final target by crossing two differently located intermediate targets. In particular, we explore the relation between self and joint agency and the information available to each player about their partner. The proposed model provides a coherent picture of the inter-relation of prediction, control, and the sense of agency in a broader range of joint actions. (shrink)

Within social psychology, group identification refers to a mental process that leads an individual to conceive of herself as a group member. This phenomenon has recently attracted a great deal of attention in the debate about shared agency. In this debate, group identification is appealing to many because it appears to explain important forms of intentionally shared actions in a cognitively unsophisticated way. This paper argues that, unless important issues about group identification are not illuminated, the heuristic function ascribed to (...) this notion for an understanding of shared agency remains dubious at best and unfulfilled at worst. This paper offers such a clarification by distinguishing and describing two different mental processes that constitute group identification: adoption of the group perspective and transformation in self-understanding. It is claimed that the latter process consists in the production of what Ruth Millikan labels “Pushmi-Pullyu representations” and that it is developmentally prior with respect to the ability of adopting the group perspective. (shrink)

Margaret Gilbert has long defended the view that, roughly speaking, agents share the intention to perform an action if and only if they jointly commit to performing that action. This view has proven both influential and controversial. While some authors have raised concerns over the joint commitment view of shared intention, including at times offering purported counterexamples to certain aspects of the view, straightforward counterexamples to the view as a whole have yet to appear in the literature. (...) Here we provide such counterexamples to show that joint commitment is neither necessary nor sufficient for shared intention. (shrink)

A co-actor’s intentionality has been suggested to be a key modulating factor for joint action effects like the joint Simon effect (JSE). However, in previous studies intentionality has often been confounded with agency defined as perceiving the initiator of an action as being the causal source of the action. The aim of the present study was to disentangle the role of agency and intentionality as modulating factors of the JSE. In Experiment 1, participants performed a (...) joint go/nogo Simon task next to a co-actor who either intentionally controlled a response button with own finger movements (agency+/intentionality+) or who passively placed the hand on a response button that moved up and down on its own as triggered by computer signals (agency-/intentionality-). In Experiment 2, we included a condition in which participants believed that the co-actor intentionally controlled the response button with a Brain-Computer Interface while placing the response finger clearly besides the response button, so that the causal relationship between agent and action effect was perceptually disrupted (agency-/intentionality+). As a control condition, the response button was computer controlled while the co-actor placed the response finger besides the response button (agency-/intentionality-). We observed a JSE when the co-actor responded intentionally and the causal relationship between co-actor and action effect could be perceived, but not when the co-actor did not respond intentionally and the causal relationship was disrupted (Experiment 1). When the intentionality of the co-actor was maintained but the perception of the causal relationship between co-actor and action effect destroyed, the JSE was absent (Experiment 2). Our findings clearly indicate a vital role of a co-actor’s agency for the JSE and suggest that the ascription of agency is strongly perceptually grounded. (shrink)

In this paper I argue that Christopher Kutz misapplies his theory of joint action when he attributes shareowners responsibilities on the basis of their intentional participation in the corporations in which they invest. Instead I propose that his theory of joint action should be used to attribute shareowners responsibilities on the basis of their intentional participation in the stock market. If shareholders’ accountability is grounded in their intentional participation in the stock market, then (...) shareholders cannot take responsibility for corporation’s individual actions. Instead they are solely responsible for the benefits they gain from holding shares if these are a result of moral wrongdoing and for this they should be held accountable. (shrink)

The paper gives a conceptual clarification of what the notion of a part of a joint action (project, etc;) involves. The - mutually recognized - division of a joint action into parts can be based on social norms (viz. formal or informal rules, or proper social norms such as conventions or group specific social norms) or it can be based on agreement, coercion, or some analogous social mechanism. The paper also discusses the notions of a we-intention, (...) of the intention to perform an action as one’s part of a joint action, and of an agent’s intentionally performing an action as his part of a joint action. (shrink)

It is often stated that joint actions are linked to so-called _directed duties_. It is not just that we should “do our part” in a joint action simply because it is the right thing to do or because it is in our best interest. Instead, we “owe” it to the other participants. Despite its _prima facie_ plausibility, this claim is not well understood. Is it true that duties in joint action are directed? Which notion of (...) directedness is relevant to understanding the normativity of joint action? I first argue that we can characterize the notion of directed duties in joint action in terms of a network of inferentially related normative relations and practices. I apply this analysis to show that duties in joint action _are_ directed. This analysis supports the view that the normativity in joint action is special as it involves what Stephen Darwall calls “individual authority” without entailing “representative authority”. A perhaps surprising conclusion derived from this account is that actions in joint action are owed to everyone involved in the group equally. This supports Margaret Gilbert’s joint commitment account of joint intention. (shrink)

Most reductionist accounts of intentional joint action include a condition that it must be common knowledge between participants that they have certain intentions and beliefs that cause and coordinate the joint action. However, this condition has typically simply been taken for granted rather than argued for. The condition is not necessary for ensuring that participants are jointly responsible for the action in which each participates, nor for ensuring that each treats the others as partners (...) rather than as social tools. It is thus something of a mystery why the condition is so widely accepted. By rejecting three arguments that could potentially support it, I argue that reductionists should get rid of the condition. I show that two of the arguments fail. While the third argument is intuitively compelling, it builds on key premises that are unavailable to the reductionist. (shrink)

The central topic of this paper is to study joint intention to perform a joint action or to bring about a certain state. Here are some examples of such joint action: You and I share the plan to carry a heavy table jointly upstairs and realize this plan, we sing a duet together, we clean up our backyard together, and I cash a check by acting jointly with you, a bank teller, and finally we together (...) elect a new president for our country. In these cases the participants can be said to have a joint intention jointly or as a group to carry the table upstairs: the content of the intention involves our performing something together and the pronoun “we” refers to us, viz. you and me and the possible other participants considered together. When we jointly intend to carry the table, each of us can be said to.. (shrink)

The ability to think for cooperating is called Shared Intentionality (Tomasello, 2014, p. 125). The advocates of the Shared Intentionality Hypothesis maintain that this is a distinctively human skill, for humans possess a foundational ability to ascribe distal intentions to conspecifics, and to share distal intentions courtesy of this capacity. Accordingly, humans appear to be provided with a specific capacity to coordinate joint actions and plans over time. I investigate to what extent such capacity can be observed to emerge (...) in non-human animals as well. (shrink)

We identify a social phenomenon in which large numbers of people seem to work towards a shared goal without explicitly trying to do so. We argue that this phenomenon – implicit coordination – is best understood as a form of joint agency differing from the forms most commonly discussed in the literature in the same way that individual actions driven by “explicit” intentions (those available for reflection and report) differ from individual actions driven by “implicit” intentions (those not thus (...) available). More precisely, implicit coordination is both analogous to wholly implicit individual intentions, and constituted by the partly implicit intentions of participants. We discuss the significance of this category for action theory, social ontology, and social criticism. (shrink)

I distinguish two kinds of contribution that have been made by recent minimalist accounts of joint action in philosophy and cognitive science relative to established philosophical accounts of shared intentional action. The “complementarists” seek to analyze a functionally different kind of joint action from the kind of joint action that is analyzed by established philosophical accounts of shared intentional action. The “constitutionalists” seek to expose mechanisms that make performing joint (...) actions possible, without taking a definite stance on which functional characterization of joint action is the appropriate one. I elucidate the contrasting methodological underpinnings of these minimalist research programs in accordance with Bechtel and Richardson’s account of the heuristics of decomposition and localization as a research strategy for the study of complex systems. (shrink)

According to some accounts, an individual participates in joint intentional cooperative action by virtue of conceiving of him- or herself and other participants as if they were parts of a single agent or body that performs the action. I argue that this notional singularization move fails if they act as if they were parts of a single agent. It can succeed, however, if the participants act as if to bring about the goal of a properly functioning (...) single body in action of which they would be parts. This latter version of the move manages to capture the cooperative character of joint intentional cooperative action. It does this without requiring of participants that they act on higher-order interlocking intentions. (shrink)

The paper argues that contexts of interaction are structured in a way that coordinates part actions into normatively guided joint action without agents having common knowledge or mutual beliefs about intentions, beliefs, or commitments to part actions. The argument shows earlier analyses of joint action to be fundamentally flawed because they have not taken contextual influences on joint action properly into account. Specific completion of earlier analyses is proposed. It is concluded that attention to (...) features distributed in context of interaction that signal expected part actions is sufficient for a set of part actions to qualify as a joint action. (shrink)