There is an increasing amount of empirical work investigating the sense of agency, i.e. the registration that we are the initiators of our own actions. Many studies try to relate the sense of agency to an internal feed-forward mechanism, called the ‘‘comparator model’’. In this paper, we draw a sharp distinction between a non-conceptual level of feeling of agency and a conceptual level of judgement of agency. By analyzing recent empirical studies, we show that the comparator model is not able (...) to explain either. Rather, we argue for a two-step account: a multifactorial weighting process of different agency indicators accounts for the feeling of agency, which is, in a second step, further processed by conceptual modules to form an attribution judgement. This new framework is then applied to disruptions of agency in schizophrenia, for which the comparator model also fails. Two further extensions are discussed: We show that the comparator model can neither be extended to account for the sense of ownership (which also has to be differentiated into a feeling and a judgement of ownership) nor for the sense of agency for thoughts. Our framework, however, is able to provide a unified account for the sense of agency for both actions and thoughts. (shrink)

Voluntary actions and their distal effects are intimately related in conscious awareness. When an expected effect follows a voluntary action, the experience of the interval between these events is compressed in time, a phenomenon known as ‘intentional binding’ . Current accounts of IB suggest that it serves to reinforce associations between our goals and our intention to attain these goals via action, and that IB only occurs for self-generated actions. We used a novel approach to study IB in the context (...) of shared intentions and actions. Pairs of participants judged the time of occurrence of actions and events attributed either to oneself or to another agent. We found that IB and subjective agency are not mutually predictive when an action can be attributed to only one of two ‘co-intending’ agents. Our results pose a complication for the prevailing view that IB and subjective agency reflect a common mechanism. (shrink)

After a long period of neglect, the phenomenology of action has recently regained its place in the agenda of philosophers and scientists alike. The recent explosion of interest in the topic highlights its complexity. The purpose of this paper is to propose a conceptual framework allowing for a more precise characterization of the many facets of the phenomenology of agency, of how they are related and of their possible sources. The key assumption guiding this attempt is that the processes through (...) which the phenomenology of action is generated and the processes involved in the specification and control of action are strongly interconnected. I argue in favor of a three-tiered dynamic model of intention, link it to an expanded version of the internal model theory of action control and specification, and use this theoretical framework to guide an analysis of the contents, possible sources and temporal course of complementary aspects of the phenomenology of action. (shrink)

Intentional binding describes the phenomenon that actions and their effects are perceived to be temporally approximated. We introduced a new method of duration estimation to the research field, the method of constant stimuli. Participants freely chose to press one of two keys or experienced passive key presses. After an interval of 250 ms or 600 ms a visual effect occurred. In Experiment 1, each key produced an effect after a specific interval. In Experiment 2, both keys produced an effect after (...) the same interval that varied between sessions. Participants compared the duration of the action–effect interval with a tone of varying duration. To assess intentional binding, we compared the perceived duration of the action–effect interval between the active and passive condition. We showed intentional binding for 600 ms, but not for 250 ms action–effect intervals in both experiments. Thus, the method of constant stimuli is suitable to assess intentional binding. (shrink)

Recently, it has been shown that the perceived times of voluntary movements and their effects are perceived as shifted towards each other. This temporal binding phenomenon was explained by an integrated representation of movement and effect, facilitating operant learning and the experience of intentionality. Here, we investigated whether temporal binding depends on explicit intentional attributions. In Experiment 1, participants intended to either produce or avoid producing an effect by the timing of their movements, with the ratio of success being fixed (...) at 2:1. In Experiments 2 and 3, the influence of the action–effect contingency ratio on temporal binding was controlled for by removing the intentional attribution of the effect. The results indicate that temporal binding is a general associative mechanism that facilitates the learning of movement–effect contingencies. Beyond that, temporal binding is sensitive to explicit intentional attributions, which selectively enhance the link between an intentional movement and the effect a moving agent intends to produce. (shrink)

Previous research has demonstrated that self-involvement enhances the memorability of information encountered in the past. The emergence of this effect, however, is dependent on guided evaluative processing and the explicit association of items with self. It remains to be seen, therefore, whether self-memory effects would emerge in task contexts characterized by incidental-encoding and minimal self-involvement. Integrating insights from work on source monitoring and action recognition, we hypothesized that the effects of self-involvement on memory function may be moderated by the extent (...) to which encoding experiences entail volitional processing. The results of three experiments supported this prediction. Despite the adoption of an incidental task context and stimulus materials that were inconsequential to participants, the act of selection enhanced the memorability and accessibility of information. The implications of these findings for contemporary treatments of self are considered. (shrink)

Patients with delusions of control are abnormally aware of the sensory consequences of their actions and have difficulty with on-line corrections of movement. As a result they do not feel in control of their movements. At the same time they are strongly aware of the action being intentional. This leads them to believe that their actions are being controlled by an external agent. In contrast, the normal mark of the self in action is that we have very little experience of (...) it. Most of the time we are not aware of the sensory consequences of our actions or of the various subtle corrections that we make during the course of goal-directed actions. We know that we are agents and that we are successfully causing the world to change. But as actors we move through the world like shadows glimpsed only occasional from the corner of an eye. (shrink)

The sense of agency is the experience of being the origin of a sensory consequence. This study investigates whether contextual beliefs modulate low-level sensorimotor processes which contribute to the emergence of the sense of agency. We looked at the influence of causal beliefs on ‘intentional binding’, a phenomenon which accompanies self-agency. Participants judged the onset-time of either an action or a sound which followed the action. They were induced to believe that the tone was either triggered by themselves or by (...) somebody else, although, in reality, the sound was always triggered by the participants. We found that intentional binding was stronger when participants believed that they triggered the tone, compared to when they believed that another person triggered the tone. These results suggest that high-level contextual information influences sensorimotor processes responsible for generating intentional binding. (shrink)

Previous research has demonstrated that self-involvement enhances the memorability of information encountered in the past. The emergence of this effect, however, is dependent on guided evaluative processing and the explicit association of items with self. It remains to be seen, therefore, whether self-memory effects would emerge in task contexts characterized by incidental-encoding and minimal self-involvement. Integrating insights from work on source monitoring and action recognition, we hypothesized that the effects of self-involvement on memory function may be moderated by the extent (...) to which encoding experiences entail volitional processing. The results of three experiments supported this prediction. Despite the adoption of an incidental task context and stimulus materials that were inconsequential to participants, the act of selection enhanced the memorability and accessibility of information. The implications of these findings for contemporary treatments of self are considered. (shrink)

In this paper, I will analyse the relation between a sense of agency and free will. It is often proposed that by investigating the former, we can find a way of judging when an action is voluntary. Haggard seems to be one of the authors believing so. To answer if this assumption is correct, I will: 1) analyse the categories of free will and agency; 2) define the sense of agency; 3) describe ways of investigating the sense of agency; 4) (...) describe models of emergence of the sense of agency; 5) analyse the relation between agency and responsibility. I will end by discussing the actual possibility of using the sense of agency measurements (as described in experimental sciences) as markers of free will. (shrink)

We can easily discriminate self-produced from externally generated sensory signals. Recent studies suggest that the prediction of the sensory consequences of one’s own actions made by forward model can be used to attenuate the sensory effects of self-produced movements, thereby enabling a differentiation of the self-produced sensation from the externally generated one. The present study showed that attenuation of sensation occurred both when participants themselves performed a goal-directed action and when they observed experimenter performing the same action, although they clearly (...) reported that the tones were produced by other during action observation and by themselves during their own action. These results suggest that sensory prediction of action modulates ongoing auditory processing irrespective of who produces the sounds and that the explicit judgment of agency does not necessarily rely on the same mechanisms on which implicit perceptual measures such as sensory attenuation rely. (shrink)

The now growing literature on the content and sources of the phenomenology of first-person agency highlights the multi-faceted character of the phenomenology of agency and makes it clear that the experience of agency includes many other experiences as components. This paper examines the possible relations between these components of our experience of acting and the processes involved in action specification and action control. After a brief discussion of our awareness of our goals and means of action, it will focus on (...) the sense of agency for a given action, understood as the sense the agent has that he or she is the author of that action. I argue that the sense of agency can be analyzed as a compound of more basic experiences, including the experience of intentional causation, the sense of initiation and the sense of control. I further argue that the sense of control may itself be analysed into a number of more specific, partially dissociable experiences. (shrink)