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17Strong perceptual consequences of low-level visual predictions: A new illusionCognition 230 (C): 105279. 2023.
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13Evidence for visual temporal order processing below the threshold for conscious perceptionCognition 207 (C): 104528. 2021.
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13Getting Stuck in the Ordered Sequence: Disrupted Temporal Processing in Patients with Schizophrenia and What It Tells Us About the Sense of Time ContinuityIn Adrian Bardon, Valtteri Arstila, Sean Power & Argiro Vatakis (eds.), The Illusions of Time: Philosophical and Psychological Essays on Timing and Time Perception, Palgrave Macmillan. 2019.Phenomenologists have long reported a breakdown of the temporal structure of consciousness in patients with schizophrenia, with a disruption of the sense of time continuity. I shortly summarize the models in phenomenology and in experimental psychology that have been proposed to explain how we reach a sense of time continuity. More recently, experimental results have revealed timing difficulties in patients with schizophrenia, both at unconscious and conscious levels, with a surprising high time…Read more
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14Disrupted Continuity of Subjective Time in the Milliseconds Range in the Self-Distrubances of Schizophrenia: Convergence of Experimental, Phenomenological, and Predictive Coding AccountsJournal of Consciousness Studies 24 (3-4): 62-87. 2017.The impression of time continuity is a pervasive and given property of our subjective life. However, it appears to be compromised in patients with schizophrenia who experience what has been labelled 'self-disturbances'. We propose that the gaps in the continuity of self-experience in schizophrenia reflect disruption of non-conscious levels of temporal processing and indicate how this view is supported by experimental, phenomenological, and predictive coding approaches. Both experimental data and…Read more
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24Motor Synchronization in Patients With Schizophrenia: Preserved Time Representation With Abnormalities in Predictive TimingFrontiers in Human Neuroscience 12. 2018.Objective: Basic temporal dysfunctions have been described in patients with schizophrenia, which may impact their ability to connect and synchronize with the outer world. The present study was conducted with the aim to distinguish between interval timing and synchronization difficulties and more generally the spatial-temporal organization disturbances for voluntary actions. A new sensorimotor synchronization task was developed to test these abilities. Method: Twenty-four chronic schizophrenia pa…Read more
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34Minimal Self and Timing Disorders in Schizophrenia: A Case ReportFrontiers in Human Neuroscience 12. 2018.For years, phenomenological psychiatry has proposed that distortions of the temporal structure of consciousness contribute to the abnormal experiences described before schizophrenia emerges, and may relate to basic disturbances in consciousness of the self. However, considering that temporality refers mainly to an implicit aspect of our relationship with the world, disturbances in the temporal structure of consciousness remain difficult to access. Nonetheless, previous studies have shown a corre…Read more
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38Is Schizophrenia a Disorder of Consciousness? Experimental and Phenomenological Support for Anomalous Unconscious ProcessingFrontiers in Psychology 8. 2017.Decades ago, several authors have proposed that disorders in automatic processing lead to intrusive symptoms or abnormal contents in the consciousness of people with schizophrenia. However, since then, studies have mainly highlighted difficulties in patients’ conscious experiencing and processing but rarely explored how unconscious and conscious mechanisms may interact in producing this experience. We report three lines of research, focusing on the processing of spatial frequencies, unpleasant i…Read more
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28Looking at a pair of objects is easy when automatic grouping mechanisms bind these objects together, but visual exploration can also be more flexible. It is possible to mentally “re-group” two objects that are not only separate but belong to different pairs of objects. “Re-grouping” is in conflict with automatic grouping, since it entails a separation of each item from the set it belongs to. This ability appears to be impaired in patients with schizophrenia. Here we check if this impairment is s…Read more
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35Focused attention is not enough to activate discontinuities in lines, but scrutiny isConsciousness and Cognition 14 (3): 613-632. 2005.We distinguish between the roles played by spatial attention and conscious intention in terms of their impact on the processing of segmentation signals, like discontinuities in lines, associated with the act of scrutinizing. We showed previously that the processing of discontinuities in lines can be activated. This is evidenced by an impairment in the detection of a gap between parallel elements when it follows a gap between collinear elements in the same location and orientation. This effect is…Read more
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91Dispositional Mindfulness and Subjective Time in Healthy IndividualsFrontiers in Psychology 7. 2016.How a human observer perceives duration depends on the amount of events taking place during the timed interval, but also on psychological dimensions, such as emotional-wellbeing, mindfulness, impulsivity, and rumination. Here we aimed at exploring these influences on duration estimation and passage of time judgments. One hundred and seventeen healthy individuals filled out mindfulness (FFMQ), impulsivity (BIS-11), rumination (RRS), and depression (BDI-sf) questionnaires. Participants also conduc…Read more
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30Implicit Timing as the Missing Link between Neurobiological and Self Disorders in Schizophrenia?Frontiers in Human Neuroscience 10. 2016.Disorders of consciousness and the self are at the forefront of schizophrenia symptomatology. Patients are impaired in feeling themselves as the authors of their thoughts and actions. In addition, their flow of consciousness is disrupted, and thought fragmentation has been suggested to be involved in the patients’ difficulties in feeling as being one unique, unchanging self across time. Both impairments are related to self disorders, and both have been investigated at the experimental level. Her…Read more
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15Feeling of control of an action after supra and subliminal haptic distortionsConsciousness and Cognition 35 16-29. 2015.Here we question the mechanisms underlying the emergence of the feeling of control that can be modulated even when the feeling of being the author of one’s own action is intact. With a haptic robot, participants made series of vertical pointing actions on a virtual surface, which was sometimes postponed by a small temporal delay (15 or 65 ms). Subjects then evaluated their subjective feeling of control. Results showed that after temporal distortions, the hand-trajectories were adapted effectivel…Read more
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20On Disturbed Time Continuity in Schizophrenia: An Elementary Impairment in Visual Perception?Frontiers in Psychology 4. 2013.Schizophrenia is associated with a series of visual perception impairments, which might impact on the patients’ every day life and be related to clinical symptoms. However, the heterogeneity of the visual disorders make it a challenge to understand both the mechanisms and the consequences of these impairments, i.e., the way patients experience the outer world. Based on earlier psychiatry literature, we argue that issues regarding time might shed a new light on the disorders observed in patients …Read more
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37Unconscious task set priming with phonological and semantic tasksConsciousness and Cognition 22 (2): 517-527. 2013.Whether unconscious stimuli can modulate the preparation of a cognitive task is still controversial. Using a backward masking paradigm, we investigated whether the modulation could be observed even if the prime was made unconscious in 100% of the trials. In two behavioral experiments, subjects were instructed to initiate a phonological or semantic task on an upcoming word, following an explicit instruction and an unconscious prime. When the SOA between prime and instruction was sufficiently long…Read more
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34What Happens in a MomentFrontiers in Psychology 6. 2015.Therehasbeenevidencefortheverybrief,temporalquantizationofperceptualexperienceatregularintervalsbelow100msforseveraldecades.Webrieflydescribehowearlierstudiesledtotheconceptof“psychologicalmoment”ofbetween50and60msduration.Accordingtohistoricaltheories,withinthepsychologicalmomentalleventswouldbeprocessedasco-temporal.Morerecently,alinkwithphysiologicalmechanismshasbeenproposed,accordingtowhichthe50–60mspsychologicalmomentwouldbedefinedbytheupperlimitrequiredbyneuralmechanismstosynchronizeandthe…Read more
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Strasbourg UniversityResearch Director
Strasbourg, Alsace, France
Areas of Specialization
Neuroscience |
Psychiatry and Psychotherapy |
Psychology |
Cognitive Sciences, Misc |
Areas of Interest
Neuroscience |
Psychology |
Cognitive Sciences, Misc |