... Pour Peterson et Gibson (1991), ce sont les parties de la figure sur lesquelles le sujet foca... more ... Pour Peterson et Gibson (1991), ce sont les parties de la figure sur lesquelles le sujet focalise son attention qui sont perçues plus proches que les autres. ... L'alternance peut même se produire à partir d'une image consécutive (Magnussen, 1970). ...
... L'évocation mentale d'un mouvement est liée à la préparation de celui-ci (Jeannerod... more ... L'évocation mentale d'un mouvement est liée à la préparation de celui-ci (Jeannerod, 1994). ... Un carré complet, c'est le modèle, et la mienne » (Aude, 17 ans); « Au début, j'ai une image de base, générale puis elle bouge parce que mes yeux bougent » (Carole, 19 ans). ...
This paper deals with the mental simulation of manual movement that sometimes accompanies the vis... more This paper deals with the mental simulation of manual movement that sometimes accompanies the visual perception of an object. Previous studies investigated how visual objects prime the grasping manual movement they afford. The principal purpose of the present experiment was to determine if such visuomotor priming also concerns the reaching manual movement that visual objects afford. During a perceptual decision task, 32
This study examined the links between attention, hand movements and eye movements when performed ... more This study examined the links between attention, hand movements and eye movements when performed in different spatial areas. Participants performed a visual search task on a computer screen while preparing to press two keyboard keys sequentially with their index. Results showed that the planning of the manual sequence influenced the latency of the first saccade and the placement of the first fixation. In particular, even if the first fixation placement was influenced by the combination of both components of the prepared manual sequence in some trials, it was affected principally by the first component of the prepared manual sequence. Moreover, the probability that the first fixation placement did reflect a combination of both components of the manual sequence was correlated with the speed of the second component. This finding suggests that the preparation of the second component of the sequence influence simultaneous oculomotor behavior when motor control of the manual sequence relied on proactive motor planning. These results are discussed taking into account the current debate on the eye/hand coordination research.
The purpose of the present experiment was to show that during a perceptual decision task, the mer... more The purpose of the present experiment was to show that during a perceptual decision task, the mere presentation of a visual target activate representation of the manual movement that would allow to reach the visual object. Indeed the results confirm that visual objects primed the reaching movement they afford (6). Without any effect of manual response on the reaction time, it suggest that the reaching amplitude of the movement did not influence the duration of its preparation. In the present study, contrary to what have been previously done(3, 4, 5), the activation of motor representation functionally linked to the visual object did not influence the decision process. Indeed, mentally simulate reaching an object does not help to judge its color. Consequently the motor activation probably influence the preparation of the participant’s manual response: the preparation of the response was faster when the participant first activate a reaching response whose amplitude is compatible with ...
This article appeared in a journal published by Elsevier. The attached copy is furnished to the a... more This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.
This paper deals with visual memory of moving shapes. During a visual recognition task, shapes mo... more This paper deals with visual memory of moving shapes. During a visual recognition task, shapes moved on a computer screen, at a constant speed, and in a direction that was either similar, orthogonal or opposite to the direction of motion during learning. Results showed that correct response rate varies according to oculomotor factors: (1) the motor skill of ocular pursuit during learning and (2) the compatibility between motor control of ocular pursuits during learning and recognition. These data suggest that recognition of a moving shape is linked to recognition of ocular pursuits that subjects had previously repeated during shape learning. Possible neural substrates underlying this sensorimotor integration are discussed. More generally, these data shed light on the role of eye movements in visual memory organization.
Your article is protected by copyright and all rights are held exclusively by Springer-Verlag Ber... more Your article is protected by copyright and all rights are held exclusively by Springer-Verlag Berlin Heidelberg. This e-offprint is for personal use only and shall not be selfarchived in electronic repositories. If you wish to self-archive your work, please use the accepted author's version for posting to your own website or your institution's repository. You may further deposit the accepted author's version on a funder's repository at a funder's request, provided it is not made publicly available until 12 months after publication.
This study examined the links between attention, hand movements and eye movements when performed ... more This study examined the links between attention, hand movements and eye movements when performed in different spatial areas. Participants performed a visual search task on a computer screen while preparing to press two keyboard keys sequentially with their index. Results showed that the planning of the manual sequence influenced the latency of the first saccade and the placement of the first fixation. In particular, even if the first fixation placement was influenced by the combination of both components of the prepared manual sequence in some trials, it was affected principally by the first component of the prepared manual sequence. Moreover, the probability that the first fixation placement did reflect a combination of both components of the manual sequence was correlated with the speed of the second component. This finding suggests that the preparation of the second component of the sequence influence simultaneous oculomotor behavior when motor control of the manual sequence relied on proactive motor planning. These results are discussed taking into account the current debate on the eye/hand coordination research.
Previous studies on visuomotor priming have provided insufficient information to determine whethe... more Previous studies on visuomotor priming have provided insufficient information to determine whether the reach-to-grasp potentiation of a non-target object produces a specific effect during response execution. In order to answer this question, subjects were instructed to reach and grasp a response device with either a power or a precision grip, depending on whether the stimulus they saw was empty or full. Stimuli consisted of containers (graspable with either a power or a precision grip), with non-graspable stimuli added as a control condition (geometrical shapes). The image of the non-target object was removed during the execution phase. Results demonstrate slower execution responses related to motor incompatibility, though conversely, no faster responses with motor compatibility. Moreover, any visuomotor priming effect required that the container be displayed during response execution. These data suggest that during response execution, motor incompatibility produces a disruptive effect likely due to competition between two cerebral events: motor control of the actual response execution and visual object reachto-grasp neural simulation.
... Pour Peterson et Gibson (1991), ce sont les parties de la figure sur lesquelles le sujet foca... more ... Pour Peterson et Gibson (1991), ce sont les parties de la figure sur lesquelles le sujet focalise son attention qui sont perçues plus proches que les autres. ... L'alternance peut même se produire à partir d'une image consécutive (Magnussen, 1970). ...
... L'évocation mentale d'un mouvement est liée à la préparation de celui-ci (Jeannerod... more ... L'évocation mentale d'un mouvement est liée à la préparation de celui-ci (Jeannerod, 1994). ... Un carré complet, c'est le modèle, et la mienne » (Aude, 17 ans); « Au début, j'ai une image de base, générale puis elle bouge parce que mes yeux bougent » (Carole, 19 ans). ...
This paper deals with the mental simulation of manual movement that sometimes accompanies the vis... more This paper deals with the mental simulation of manual movement that sometimes accompanies the visual perception of an object. Previous studies investigated how visual objects prime the grasping manual movement they afford. The principal purpose of the present experiment was to determine if such visuomotor priming also concerns the reaching manual movement that visual objects afford. During a perceptual decision task, 32
This study examined the links between attention, hand movements and eye movements when performed ... more This study examined the links between attention, hand movements and eye movements when performed in different spatial areas. Participants performed a visual search task on a computer screen while preparing to press two keyboard keys sequentially with their index. Results showed that the planning of the manual sequence influenced the latency of the first saccade and the placement of the first fixation. In particular, even if the first fixation placement was influenced by the combination of both components of the prepared manual sequence in some trials, it was affected principally by the first component of the prepared manual sequence. Moreover, the probability that the first fixation placement did reflect a combination of both components of the manual sequence was correlated with the speed of the second component. This finding suggests that the preparation of the second component of the sequence influence simultaneous oculomotor behavior when motor control of the manual sequence relied on proactive motor planning. These results are discussed taking into account the current debate on the eye/hand coordination research.
The purpose of the present experiment was to show that during a perceptual decision task, the mer... more The purpose of the present experiment was to show that during a perceptual decision task, the mere presentation of a visual target activate representation of the manual movement that would allow to reach the visual object. Indeed the results confirm that visual objects primed the reaching movement they afford (6). Without any effect of manual response on the reaction time, it suggest that the reaching amplitude of the movement did not influence the duration of its preparation. In the present study, contrary to what have been previously done(3, 4, 5), the activation of motor representation functionally linked to the visual object did not influence the decision process. Indeed, mentally simulate reaching an object does not help to judge its color. Consequently the motor activation probably influence the preparation of the participant’s manual response: the preparation of the response was faster when the participant first activate a reaching response whose amplitude is compatible with ...
This article appeared in a journal published by Elsevier. The attached copy is furnished to the a... more This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.
This paper deals with visual memory of moving shapes. During a visual recognition task, shapes mo... more This paper deals with visual memory of moving shapes. During a visual recognition task, shapes moved on a computer screen, at a constant speed, and in a direction that was either similar, orthogonal or opposite to the direction of motion during learning. Results showed that correct response rate varies according to oculomotor factors: (1) the motor skill of ocular pursuit during learning and (2) the compatibility between motor control of ocular pursuits during learning and recognition. These data suggest that recognition of a moving shape is linked to recognition of ocular pursuits that subjects had previously repeated during shape learning. Possible neural substrates underlying this sensorimotor integration are discussed. More generally, these data shed light on the role of eye movements in visual memory organization.
Your article is protected by copyright and all rights are held exclusively by Springer-Verlag Ber... more Your article is protected by copyright and all rights are held exclusively by Springer-Verlag Berlin Heidelberg. This e-offprint is for personal use only and shall not be selfarchived in electronic repositories. If you wish to self-archive your work, please use the accepted author's version for posting to your own website or your institution's repository. You may further deposit the accepted author's version on a funder's repository at a funder's request, provided it is not made publicly available until 12 months after publication.
This study examined the links between attention, hand movements and eye movements when performed ... more This study examined the links between attention, hand movements and eye movements when performed in different spatial areas. Participants performed a visual search task on a computer screen while preparing to press two keyboard keys sequentially with their index. Results showed that the planning of the manual sequence influenced the latency of the first saccade and the placement of the first fixation. In particular, even if the first fixation placement was influenced by the combination of both components of the prepared manual sequence in some trials, it was affected principally by the first component of the prepared manual sequence. Moreover, the probability that the first fixation placement did reflect a combination of both components of the manual sequence was correlated with the speed of the second component. This finding suggests that the preparation of the second component of the sequence influence simultaneous oculomotor behavior when motor control of the manual sequence relied on proactive motor planning. These results are discussed taking into account the current debate on the eye/hand coordination research.
Previous studies on visuomotor priming have provided insufficient information to determine whethe... more Previous studies on visuomotor priming have provided insufficient information to determine whether the reach-to-grasp potentiation of a non-target object produces a specific effect during response execution. In order to answer this question, subjects were instructed to reach and grasp a response device with either a power or a precision grip, depending on whether the stimulus they saw was empty or full. Stimuli consisted of containers (graspable with either a power or a precision grip), with non-graspable stimuli added as a control condition (geometrical shapes). The image of the non-target object was removed during the execution phase. Results demonstrate slower execution responses related to motor incompatibility, though conversely, no faster responses with motor compatibility. Moreover, any visuomotor priming effect required that the container be displayed during response execution. These data suggest that during response execution, motor incompatibility produces a disruptive effect likely due to competition between two cerebral events: motor control of the actual response execution and visual object reachto-grasp neural simulation.
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