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Yann Coello - One of the best experts on this subject based on the ideXlab platform.
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the combined effects of Motor and social goals on the kinematics of object directed Motor Action
Scientific Reports, 2020Co-Authors: Maria-francesca Gigliotti, Angela Bartolo, Adriana Sampaio, Yann CoelloAbstract:Voluntary Actions towards manipulable objects are usually performed with a particular Motor goal (i.e., a task-specific object-target-effector interAction) and in a particular social context (i.e., who would benefit from these Actions), but the mutual influence of these two constraints has not yet been properly studied. For this purpose, we asked participants to grasp an object and place it on either a small or large target in relation to Fitts' law (Motor goal). This first Action prepared them for a second grasp-to-place Action which was performed under temporal constraints, either by the participants themselves or by a confederate (social goal). Kinematic analysis of the first preparatory grasp-to-place Action showed that, while deceleration time was impacted by the Motor goal, peak velocity was influenced by the social goal. Movement duration and trajectory height were modulated by both goals, the effect of the social goal being attenuated by the effect of the Motor goal. Overall, these results suggest that both Motor and social constraints influence the characteristics of object-oriented Actions, with effects that combine in a hierarchical way.
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A New Computational Approach to Identify Human Social intention in Action
IEEE International Conference on AUTOMATIC FACE AND GESTURE RECOGNITION (FG 2018), 2018Co-Authors: Mohamed Daoudi, Paul Desrosiers, Paul Audain Descrosiers, Yann Coello, Laurent OttAbstract:In this paper, we propose to analyze the trajectories of the human arm to predict social intention (personal or social intention). The trajectories of different 3D markers acquired by Mocap system, are defined in shape spaces of open curves. The results obtained in the experiments on a new dataset show an average recognition of about 68% for the proposed method, which is comparable with the average score produced by human evaluation. The experimental results show also that the classification rate could be used to improve social communication between human and virtual agents. To the best of our knowledge, this is the first paper which uses computer vision techniques to analyze the effect of social intention on Motor Action for improving the social communication between human and avatar.
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Cooperative and competitive contexts do not modify the effect of social intention on Motor Action
Consciousness and Cognition, 2017Co-Authors: Astrid Mignon, Fran??ois Quesque, Yann CoelloAbstract:In social interActions, the movements performed by others can be used to anticipate their intention. The present paper investigates whether cooperative vs competitive contexts influence the kinematics of object-directed Motor Actions and whether they modulate the effect of social intention on Motor Actions. An "Actor" and a "Partner" participated in a task consisting in displacing a wooden dowel under time constraint. Before this Main Action, the Actor performed a Preparatory Action which consisted in placing the dowel at the center of the table. Information about who would make the forthcoming Main Action was provided only to the Actor through headphones. Results demonstrate an exaggeration of spatial and temporal Actions' parameters when acting for the Partner, in cooperative, as well as in competitive context. This finding suggests that the Motor manifestation of social intention is largely determined by non-conscious implicit processes that seem little influenced by the context of social interAction.
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Motor Action reduces the temporal asynchrony between two visual but not visuo-tactile changes
2016Co-Authors: Xavier Corveleyn, Joan López-moliner, Yann CoelloAbstract:no abstract
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Motor Action reduces the temporal asynchrony between two visual changes
2016Co-Authors: Xavier Corveleyn, Joan López-moliner, Yann CoelloAbstract:no abstract
Xavier Corveleyn - One of the best experts on this subject based on the ideXlab platform.
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Motor Action reduces the temporal asynchrony between two visual changes
2016Co-Authors: Xavier Corveleyn, Joan López-moliner, Yann CoelloAbstract:no abstract
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Motor Action reduces the temporal asynchrony between two visual but not visuo-tactile changes
2016Co-Authors: Xavier Corveleyn, Joan López-moliner, Yann CoelloAbstract:no abstract
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temporal and spatial constraints of Action effect on sensory binding
Experimental Brain Research, 2015Co-Authors: Xavier Corveleyn, Joan Lopezmoliner, Yann CoelloAbstract:Previous studies have shown that asynchrony in perceived changes in the visual attributes of an object is attenuated when the object is the target of a manual reaching Action (e.g. Corveleyn et al. in J Vis, 2012. doi: 10.1167/12.11.20). In the present study, we examined the temporal and spatial constraints associated with the effect of Action on sensory binding. Participants performed a temporal order judgment task which required them to judge which changed first, the position or the colour of a visual stimulus, either while performing a concurrent Motor task (manual acquisition of a visual target) or not (perceptual task). In Experiment 1, the fixed-attribute change (colour or position) occurred 0, 250, 500 or 1000 ms following the end of the Motor Action or the presentation of an auditory cue, while the variable-attribute change (position or colour) occurred randomly within an interval of ±200 ms from the fixed-attribute change. In Experiment 2, the visual stimulus was presented at a distance of 0, 2, 4 or 8 cm from a central fixation cross which was the target in the Motor task. The fixed attribute (colour or position) changed 700 ms after an auditory cue (perceptual task) or when the hand reached the visual target (Motor task). The variable-attribute change (position or colour) again occurred within an interval of ±200 ms from the fixed-attribute change. Statistical analysis of the point of subjective simultaneity revealed that performing a Motor Action reduced the perceived temporal asynchrony in the perceptual task, but only when the visual changes occurred less than 500 ms (for the fixed attribute) following movement execution (Exp. 1) and at a distance of less than 4 cm from the movement endpoint (Exp. 2). These results indicate that Action-induced sensory binding requires temporal contiguity and spatial congruency between the endpoint of the Action and its visual consequences.
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SensoriMotor adaptation modifies Action effects on sensory binding
Attention, Perception, & Psychophysics, 2015Co-Authors: Xavier Corveleyn, Joan Lopezmoliner, Joan López-moliner, Yann CoelloAbstract:Previous studies have shown that performing a Motor Action toward a target decreases the perceptual asynchrony observed in a temporal order judgment (TOJ) of a change in the target’s visual attributes. We examined the temporal limit of this effect and whether this temporal limit can be extended through sensoriMotor adaptation. Participants performed a TOJ task related to changes of the position and color of a visual stimulus in a perceptual and a Motor task. A fixed change (color or position) occurred 250 or 500 ms following an auditory cue (perceptual task) or the end of a manual reaching Action (Motor task), whereas the variable change (position or color) occurred randomly within a time window of ±200 ms locked to the fixed change. The points of subjective simultaneity (PSSs) revealed that performing a voluntary Action decreased the temporal asynchrony observed in the perceptual task, but only in the 250-ms delay condition. In Experiment 2, the fixed change occurred 1 s after either an auditory cue or the end of a manual reaching Action, and the variable change occurred either simultaneously (new sensoriMotor contingencies, 60 % of trials) or within a time window of ±200 ms (40 % of trials). The PSSs revealed that temporal asynchrony decreased in the Motor task, but only after adaptation to the 1-s delay. Taken together, these data show that voluntary Motor Action affects the temporal binding of visual attributes for a period of less than 500 ms after the end of the Action. SensoriMotor adaptation can nevertheless extend this time interval, at least up to 1 s.
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Motor Action reduces temporal asynchrony between perceived visual changes
Journal of Vision, 2012Co-Authors: Xavier Corveleyn, Joan Lopezmoliner, Yann CoelloAbstract:Perceiving a visual object requires binding sensory estimates of its various physical attributes. This process can befacilitated if changes of different attributes are perceived with little asynchronies when they are physically aligned, which isnot always the case as revealed by temporal order judgment or perceptual synchronization tasks of visual attributeschanges. In this study, we analyzed the effect of performing a Motor Action on the perceived relative timing betweenchanges of position and color of a visual target by using a temporal order judgment (TOJ) task. Results showed that in theperceptual condition, the change of color must precede ( 37.9 ms) the change of position in order to perceive asynchronous change of both target’s visual attributes. This physical asynchrony vanished when the same changes tookplace near the end of a manual reaching Action executed towards the visual target ( 3.3 ms). The reduction of asynchronywas, however, not observed when participants performed TOJ of visual attributes change in the presence of concomitanttactile information ( 36 ms) but with no Action. The perceptual relative timing between visual changes was also unaffectedwhen the timing was obtained by comparing each visual change to tactile information resulting from Motor Action ( 33.5 ms)or external stimulation ( 27.8 ms). Altogether, these results suggest that signals associated with the organization of a MotorAction, but not sensory information itself, contribute to reduce the differential delays when processing visual attributes of asingle object. Furthermore, the effect of Action was not observed when judging relative timing of object-related (visual)versus object-unrelated (tactile) sensory information.Keywords: object perception, relative timing, voluntary Action, temporal order judgment, Motor intentionCitation: Corveleyn, X., Lo´pez-Moliner, J., & Coello, Y. (2012). Motor Action reduces temporal asynchrony betweenperceived visual changes. Journal of Vision, 12(11):20, 1–16, http://www.journalofvision.org/content/12/11/20, doi:10.1167/12.11.20.
Joan Lopezmoliner - One of the best experts on this subject based on the ideXlab platform.
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temporal and spatial constraints of Action effect on sensory binding
Experimental Brain Research, 2015Co-Authors: Xavier Corveleyn, Joan Lopezmoliner, Yann CoelloAbstract:Previous studies have shown that asynchrony in perceived changes in the visual attributes of an object is attenuated when the object is the target of a manual reaching Action (e.g. Corveleyn et al. in J Vis, 2012. doi: 10.1167/12.11.20). In the present study, we examined the temporal and spatial constraints associated with the effect of Action on sensory binding. Participants performed a temporal order judgment task which required them to judge which changed first, the position or the colour of a visual stimulus, either while performing a concurrent Motor task (manual acquisition of a visual target) or not (perceptual task). In Experiment 1, the fixed-attribute change (colour or position) occurred 0, 250, 500 or 1000 ms following the end of the Motor Action or the presentation of an auditory cue, while the variable-attribute change (position or colour) occurred randomly within an interval of ±200 ms from the fixed-attribute change. In Experiment 2, the visual stimulus was presented at a distance of 0, 2, 4 or 8 cm from a central fixation cross which was the target in the Motor task. The fixed attribute (colour or position) changed 700 ms after an auditory cue (perceptual task) or when the hand reached the visual target (Motor task). The variable-attribute change (position or colour) again occurred within an interval of ±200 ms from the fixed-attribute change. Statistical analysis of the point of subjective simultaneity revealed that performing a Motor Action reduced the perceived temporal asynchrony in the perceptual task, but only when the visual changes occurred less than 500 ms (for the fixed attribute) following movement execution (Exp. 1) and at a distance of less than 4 cm from the movement endpoint (Exp. 2). These results indicate that Action-induced sensory binding requires temporal contiguity and spatial congruency between the endpoint of the Action and its visual consequences.
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SensoriMotor adaptation modifies Action effects on sensory binding
Attention, Perception, & Psychophysics, 2015Co-Authors: Xavier Corveleyn, Joan Lopezmoliner, Joan López-moliner, Yann CoelloAbstract:Previous studies have shown that performing a Motor Action toward a target decreases the perceptual asynchrony observed in a temporal order judgment (TOJ) of a change in the target’s visual attributes. We examined the temporal limit of this effect and whether this temporal limit can be extended through sensoriMotor adaptation. Participants performed a TOJ task related to changes of the position and color of a visual stimulus in a perceptual and a Motor task. A fixed change (color or position) occurred 250 or 500 ms following an auditory cue (perceptual task) or the end of a manual reaching Action (Motor task), whereas the variable change (position or color) occurred randomly within a time window of ±200 ms locked to the fixed change. The points of subjective simultaneity (PSSs) revealed that performing a voluntary Action decreased the temporal asynchrony observed in the perceptual task, but only in the 250-ms delay condition. In Experiment 2, the fixed change occurred 1 s after either an auditory cue or the end of a manual reaching Action, and the variable change occurred either simultaneously (new sensoriMotor contingencies, 60 % of trials) or within a time window of ±200 ms (40 % of trials). The PSSs revealed that temporal asynchrony decreased in the Motor task, but only after adaptation to the 1-s delay. Taken together, these data show that voluntary Motor Action affects the temporal binding of visual attributes for a period of less than 500 ms after the end of the Action. SensoriMotor adaptation can nevertheless extend this time interval, at least up to 1 s.
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Motor Action reduces temporal asynchrony between perceived visual changes
Journal of Vision, 2012Co-Authors: Xavier Corveleyn, Joan Lopezmoliner, Yann CoelloAbstract:Perceiving a visual object requires binding sensory estimates of its various physical attributes. This process can befacilitated if changes of different attributes are perceived with little asynchronies when they are physically aligned, which isnot always the case as revealed by temporal order judgment or perceptual synchronization tasks of visual attributeschanges. In this study, we analyzed the effect of performing a Motor Action on the perceived relative timing betweenchanges of position and color of a visual target by using a temporal order judgment (TOJ) task. Results showed that in theperceptual condition, the change of color must precede ( 37.9 ms) the change of position in order to perceive asynchronous change of both target’s visual attributes. This physical asynchrony vanished when the same changes tookplace near the end of a manual reaching Action executed towards the visual target ( 3.3 ms). The reduction of asynchronywas, however, not observed when participants performed TOJ of visual attributes change in the presence of concomitanttactile information ( 36 ms) but with no Action. The perceptual relative timing between visual changes was also unaffectedwhen the timing was obtained by comparing each visual change to tactile information resulting from Motor Action ( 33.5 ms)or external stimulation ( 27.8 ms). Altogether, these results suggest that signals associated with the organization of a MotorAction, but not sensory information itself, contribute to reduce the differential delays when processing visual attributes of asingle object. Furthermore, the effect of Action was not observed when judging relative timing of object-related (visual)versus object-unrelated (tactile) sensory information.Keywords: object perception, relative timing, voluntary Action, temporal order judgment, Motor intentionCitation: Corveleyn, X., Lo´pez-Moliner, J., & Coello, Y. (2012). Motor Action reduces temporal asynchrony betweenperceived visual changes. Journal of Vision, 12(11):20, 1–16, http://www.journalofvision.org/content/12/11/20, doi:10.1167/12.11.20.
Fran??ois Quesque - One of the best experts on this subject based on the ideXlab platform.
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Cooperative and competitive contexts do not modify the effect of social intention on Motor Action
Consciousness and Cognition, 2017Co-Authors: Astrid Mignon, Fran??ois Quesque, Yann CoelloAbstract:In social interActions, the movements performed by others can be used to anticipate their intention. The present paper investigates whether cooperative vs competitive contexts influence the kinematics of object-directed Motor Actions and whether they modulate the effect of social intention on Motor Actions. An "Actor" and a "Partner" participated in a task consisting in displacing a wooden dowel under time constraint. Before this Main Action, the Actor performed a Preparatory Action which consisted in placing the dowel at the center of the table. Information about who would make the forthcoming Main Action was provided only to the Actor through headphones. Results demonstrate an exaggeration of spatial and temporal Actions' parameters when acting for the Partner, in cooperative, as well as in competitive context. This finding suggests that the Motor manifestation of social intention is largely determined by non-conscious implicit processes that seem little influenced by the context of social interAction.
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facilitation effect of observed Motor deviants in a cooperative Motor task evidence for direct perception of social intention in Action
Quarterly Journal of Experimental Psychology, 2016Co-Authors: Fran??ois Quesque, Yvonne Delevoyeturrell, Yann CoelloAbstract:Spatiotemporal parameters of voluntary Motor Action may help optimize human social interActions. Yet it is unknown whether individuals performing a cooperative task spontaneously perceive subtly informative social cues emerging through voluntary Actions. In the present study, an auditory cue was provided through headphones to an actor and a partner who faced each other. Depending on the pitch of the auditory cue, either the actor or the partner were required to grasp and move a wooden dowel under time constraints from a central to a lateral position. Before this main Action, the actor performed a preparatory Action under no time constraint, consisting in placing the wooden dowel on the central location when receiving either a neutral (“pret”–ready) or an informative auditory cue relative to who will be asked to perform the main Action (the actor: “moi”–me, or the partner: “lui”–him). Although the task focused on the main Action, analysis of Motor performances revealed that actors performed the preparatory...
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perceiving what you intend to do from what you do evidence for embodiment in social interActions
Socioaffective Neuroscience & Psychology, 2015Co-Authors: Fran??ois Quesque, Yann CoelloAbstract:Although Action and perception are central components of our interActions with the external world, the most recent experimental investigations also support their implications in the emotional, decision-making, and goal ascription processes in social context. In this article, we review the existing literature supporting this view and highlighting a link between reach-to-grasp Motor Actions and social communicative processes. First, we discuss the most recent experimental findings showing how the social context subtly influences the execution of object-oriented Motor Actions. Then, we show that the kinematic characteristics of object-oriented Motor Actions are modulated by the actor’s social intention. Finally, we demonstrate that naive observers can implicitly take advantage of these kinematic effects for their own Motor productions. Considered together, these data are compatible with the embodied cognition framework stating that cognition, and in our case social cognition, is grounded in knowledge associated with past sensory and Motor experiences. Keywords: perception; Motor Action; social intention; embodiment; kinematics
Joan López-moliner - One of the best experts on this subject based on the ideXlab platform.
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Motor Action reduces the temporal asynchrony between two visual changes
2016Co-Authors: Xavier Corveleyn, Joan López-moliner, Yann CoelloAbstract:no abstract
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Motor Action reduces the temporal asynchrony between two visual but not visuo-tactile changes
2016Co-Authors: Xavier Corveleyn, Joan López-moliner, Yann CoelloAbstract:no abstract
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SensoriMotor adaptation modifies Action effects on sensory binding
Attention, Perception, & Psychophysics, 2015Co-Authors: Xavier Corveleyn, Joan Lopezmoliner, Joan López-moliner, Yann CoelloAbstract:Previous studies have shown that performing a Motor Action toward a target decreases the perceptual asynchrony observed in a temporal order judgment (TOJ) of a change in the target’s visual attributes. We examined the temporal limit of this effect and whether this temporal limit can be extended through sensoriMotor adaptation. Participants performed a TOJ task related to changes of the position and color of a visual stimulus in a perceptual and a Motor task. A fixed change (color or position) occurred 250 or 500 ms following an auditory cue (perceptual task) or the end of a manual reaching Action (Motor task), whereas the variable change (position or color) occurred randomly within a time window of ±200 ms locked to the fixed change. The points of subjective simultaneity (PSSs) revealed that performing a voluntary Action decreased the temporal asynchrony observed in the perceptual task, but only in the 250-ms delay condition. In Experiment 2, the fixed change occurred 1 s after either an auditory cue or the end of a manual reaching Action, and the variable change occurred either simultaneously (new sensoriMotor contingencies, 60 % of trials) or within a time window of ±200 ms (40 % of trials). The PSSs revealed that temporal asynchrony decreased in the Motor task, but only after adaptation to the 1-s delay. Taken together, these data show that voluntary Motor Action affects the temporal binding of visual attributes for a period of less than 500 ms after the end of the Action. SensoriMotor adaptation can nevertheless extend this time interval, at least up to 1 s.