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Ludovic Marin

14
Documents
Identifiants chercheurs

Présentation

**education and qualifications** **1995-1997** **Ph.D. Thesis.** University of the Mediterranean, Marseille, France **2009** **Habilitation**. University Montpellier I, Montpellier, France. **General research Interests** My main research interests lie in the perception and action field, investigating how controlled movements may be coupled with sensory information. I am particularly interested in skilled behavior in infants, adults and elders, whether this be in more traditional motor control tasks or in sport settings. In addition, I have been involved with investigating different aspects of the dynamical/ecological approach to perception and action and to emotion and action. This includes how infants, adults and elders coordinate together (called *interpersonal coordination*) and control their posture, orientation and goal-directed movements as well as how visual, proprioceptive and vestibular information are used to control movement and how information and movement are coupled. **Current research** As associate professor in the “EuroMov Digital Health in Motion” laboratory at the University of Montpellier (France), my research is focused on inter-personal coordination in interlimb and postural situations. The goal of my research is to determine the sources of interpersonal coordination. Although different fields have investigated social interaction, little work has been performed to integrate their approaches in an interdisciplinary study. Consequently, our work aims at using an interdisciplinary paradigm to examine the multilevel processes that characterize motor coordination and its consequences on social interactions. In order to conduct our investigations, we collaborate with researchers from different fields (psychiatry and robotic) to examine motor coordination in healthy individuals and its impairments in agents with social disorders: patients (social phobia, autistic and schizophrenic patients) and robots (considered as having a deficit in human-robot coordination). In addition to this major research topic, we also investigate the role of the multimodality in motor social interaction. More specifically, we seek to determine the weight of each sensory modality (vision, audition, touch) and their interactions in interpersonal coordination situations. To carry out our experiments we use the original method of wavelet transform (and cross-wavelet transform) in order to measure the temporal evolution of frequency, amplitude and phase of non-stationary movements. This work is the first stage in a series of studies investigating the emotion-action coupling and the “perception-action” relationship. **Previous research** **Post doctoral fellow and lab supervisor,** from 1998 to 2001 in the “Infant Motor Development” Laboratory, Department of psychology, New York University, New York: I was interested in understanding how locomotion, postural control and motor perception was set up in infant toddlers (from 8 to 24 months old). In particular, I was focused on how these infants were able to perceive a risky environment (gaps in the floor, steep slopes, changes in surface friction and rigidity) while walking or crawling and if so, how they adapted their locomotion to cope with these various environmental constraints. **Scientific researcher** (temporary contract) from 1997 to 1998 in the “Sport and Motor Performance” Laboratory at the University of Joseph Fourier, Grenoble, France: My work was focused on spatial orientation and postural control. Studies concerning spatial orientation were conducted at the CRSSA (Army Research Center) where we investigated the role of the different sensory information (vestibular and somato sensory systems) used to control spatial orientation. The postural control studies were based on how Down’s syndrome teenagers were able to control their balance and what sensory information they mainly used to control their posture. **Ph. D. student** (competitive grant) from 1994 to 1997 in the “Movement and Perception” laboratory at the University of the Mediterranean, Marseille, France: My thesis research explored how humans coordinate their limb movements in order to produce relevant postures during a voluntary head movement task. I used concepts of the dynamical approach to explore this coordination, assuming that the large number of available degrees of freedom could be reduced to a few macroscopic descriptors able to summarize the coordination between components. I found that the phase relation between movements of the hip and ankle could be used to describe the dynamical coordination patterns of postural sway. Two stable patterns of coordination were found to emerge from the hip-ankle relations: an in-phase pattern (hip and ankle moving in the same direction) and an anti-phase pattern (these joints moving in the opposite direction). These results confirmed the relevance of using relative phase to study postural control in bipedal stance in humans.

Publications

stephane-raffard

Gesture-speech synchrony in schizophrenia: A pilot study using a kinematic-acoustic analysis

Juliette Lozano-Goupil , Stephane Raffard , Delphine Capdevielle , Emilie Aigoin , Ludovic Marin
Neuropsychologia, 2022, 174, pp.108347. ⟨10.1016/j.neuropsychologia.2022.108347⟩
Article dans une revue hal-03760182v1

Study of Coordination Between Patients with Schizophrenia and Socially Assistive Robot During Physical Activity

Lise Aubin , Ghiles Mostafaoui , Chloé Amiel , Hélène Serré , Delphine Capdevielle
International Journal of Social Robotics, 2021, 13, pp.1625-1640. ⟨10.1007/s12369-021-00750-4⟩
Article dans une revue hal-03167976v1
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Using mimicry of body movements by a virtual agent to increase synchronization behavior and rapport in individuals with schizophrenia

Stéphane Raffard , Robin Salesse , Catherine Bortolon , Benoit Bardy , José Henriques
Scientific Reports, 2018, 8 (1), ⟨10.1038/s41598-018-35813-6⟩
Article dans une revue hal-02005556v1
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Unravelling socio-motor biomarkers in schizophrenia

Piotr Slowiński , Francesco Alderisio , Chao Zhai , Yuan Shen , Peter Tino
npj Schizophrenia, 2017, 3, pp.8. ⟨10.1038/s41537-016-0009-x⟩
Article dans une revue hal-01761364v1
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Influence of facial feedback during a cooperative human-robot task in schizophrenia

Laura Cohen , Mahdi Khoramshahi , Robin N. Salesse , Catherine Bortolon , Piotr Slowiński
Scientific Reports, 2017, 7 (1), pp.15023. ⟨10.1038/s41598-017-14773-3⟩
Article dans une revue hal-01743127v2
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Humanoid robots versus humans: How is emotional valence of facial expressions recognized by individuals with schizophrenia? An exploratory study

Stéphane Raffard , Catherine Bortolon , Mahdi Khoramshahi , Robin Salesse , Marianna Burca
Schizophrenia Research, 2016, 176 (2-3), pp.506 - 513. ⟨10.1016/j.schres.2016.06.001⟩
Article dans une revue hal-01866614v1
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Social priming enhances interpersonal synchronization and feeling of connectedness towards schizophrenia patients

Stéphane Raffard , Robin Salesse , Ludovic Marin , Jonathan Del-Monte , Richard C Schmidt
Scientific Reports, 2015, 5, pp.8156. ⟨10.1038/srep08156⟩
Article dans une revue hal-02128537v1
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Social Priming Increases Nonverbal Expressive Behaviors in Schizophrenia

Jonathan Del-Monte , Stéphane Raffard , Delphine Capdevielle , Robin Salesse , Richard Schmidt
PLoS ONE, 2014, 9 (10), pp.e109139. ⟨10.1371/journal.pone.0109139⟩
Article dans une revue hal-02432838v1
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Difficulty leading interpersonal coordination: towards an embodied signature of social anxiety disorder

Manuel Varlet , Ludovic Marin , Delphine Capdevielle , Jonathan Del-Monte , R. Schmidt
Frontiers in Behavioral Neuroscience, 2014, 8, pp.29. ⟨10.3389/fnbeh.2014.00029⟩
Article dans une revue hal-02432916v1

Nonverbal expressive behaviour in schizophrenia and social phobia

Jonathan Del-Monte , Stéphane Raffard , Robin Salesse , Ludovic Marin , Richard Schmidt
Psychiatry Research, 2013, 210 (1), pp.29-35. ⟨10.1016/j.psychres.2013.05.034⟩
Article dans une revue hal-02464681v1

1283 – Social motor coordinations: a study with schizophrenia and social phobic patients

Marie-Christine Gely-Nargeot , Richard Schmidt , Delphine Capdevielle , Robin Salesse , Jonathan Del-Monte
European Psychiatry, 2013, 28 (10), pp.1. ⟨10.1016/S0924-9338(13)76346-6⟩
Article dans une revue hal-02487774v1
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Social motor coordination in unaffected relatives of schizophrenia patients: a potential intermediate phenotype

Jonathan Del-Monte , Delphine Capdevielle , Manuel Varlet , Ludovic Marin , Richard C Schmidt
Frontiers in Behavioral Neuroscience, 2013, 7, pp.137. ⟨10.3389/fnbeh.2013.00137⟩
Article dans une revue hal-02432463v1

Évolution du concept d’apathie : nécessité d’une approche multifactorielle dans la schizophrénie

Robin Salesse , Jean Philippe Boulenger , Marie Christine Gély-Nargeot , Manuel Varlet , Ludovic Marin
L'Encéphale, 2013, 39 (1), pp.S57-S63. ⟨10.1016/j.encep.2012.11.005⟩
Article dans une revue hal-02487776v1
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Impairments of Social Motor Coordination in Schizophrenia

Manuel Varlet , Ludovic Marin , Stéphane Raffard , R. Schmidt , Delphine Capdevielle
PLoS ONE, 2012, 7 (1), pp.e29772. ⟨10.1371/journal.pone.0029772⟩
Article dans une revue hal-02433312v1