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Iwata T, Yanagisawa T, Ikegaya Y, Smallwood J, Fukuma R, Oshino S, Tani N, Khoo HM, Kishima H. Hippocampal sharp-wave ripples correlate with periods of naturally occurring self-generated thoughts in humans. Nat Commun 2024; 15:4078. [PMID: 38778048 PMCID: PMC11111804 DOI: 10.1038/s41467-024-48367-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 04/29/2024] [Indexed: 05/25/2024] Open
Abstract
Core features of human cognition highlight the importance of the capacity to focus on information distinct from events in the here and now, such as mind wandering. However, the brain mechanisms that underpin these self-generated states remain unclear. An emerging hypothesis is that self-generated states depend on the process of memory replay, which is linked to sharp-wave ripples (SWRs), which are transient high-frequency oscillations originating in the hippocampus. Local field potentials were recorded from the hippocampus of 10 patients with epilepsy for up to 15 days, and experience sampling was used to describe their association with ongoing thought patterns. The SWR rates were higher during extended periods of time when participants' ongoing thoughts were more vivid, less desirable, had more imaginable properties, and exhibited fewer correlations with an external task. These data suggest a role for SWR in the patterns of ongoing thoughts that humans experience in daily life.
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Affiliation(s)
- Takamitsu Iwata
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan
| | - Takufumi Yanagisawa
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan.
- Institute for Advanced Co-Creation Studies, Osaka University, Osaka, 565-0871, Japan.
| | - Yuji Ikegaya
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, 113-0033, Japan
- Institute for AI and Beyond, The University of Tokyo, Tokyo, 113-0033, Japan
- National Institute of Information and Communications Technology, Center for Information and Neural Networks, Suita City, Osaka, 565-0871, Japan
| | - Jonathan Smallwood
- Department of Psychology, Queen's University, Kingston, ON, K7L 3N6, Canada
| | - Ryohei Fukuma
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan
- Institute for Advanced Co-Creation Studies, Osaka University, Osaka, 565-0871, Japan
| | - Satoru Oshino
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan
| | - Naoki Tani
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan
| | - Hui Ming Khoo
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan
| | - Haruhiko Kishima
- Department of Neurosurgery, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan
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Mckeown B, Strawson WH, Zhang M, Turnbull A, Konu D, Karapanagiotidis T, Wang HT, Leech R, Xu T, Hardikar S, Bernhardt B, Margulies D, Jefferies E, Wammes J, Smallwood J. Experience sampling reveals the role that covert goal states play in task-relevant behavior. Sci Rep 2023; 13:21710. [PMID: 38066069 PMCID: PMC10709616 DOI: 10.1038/s41598-023-48857-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 11/30/2023] [Indexed: 12/18/2023] Open
Abstract
Cognitive neuroscience has gained insight into covert states using experience sampling. Traditionally, this approach has focused on off-task states. However, task-relevant states are also maintained via covert processes. Our study examined whether experience sampling can also provide insights into covert goal-relevant states that support task performance. To address this question, we developed a neural state space, using dimensions of brain function variation, that allows neural correlates of overt and covert states to be examined in a common analytic space. We use this to describe brain activity during task performance, its relation to covert states identified via experience sampling, and links between individual variation in overt and covert states and task performance. Our study established deliberate task focus was linked to faster target detection, and brain states underlying this experience-and target detection-were associated with activity patterns emphasizing the fronto-parietal network. In contrast, brain states underlying off-task experiences-and vigilance periods-were linked to activity patterns emphasizing the default mode network. Our study shows experience sampling can not only describe covert states that are unrelated to the task at hand, but can also be used to highlight the role fronto-parietal regions play in the maintenance of covert task-relevant states.
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Affiliation(s)
- Brontë Mckeown
- Psychology Department, Queen's University, Kingston, K7L 3N6, Canada.
| | - Will H Strawson
- Neuroscience, Brighton and Sussex Medical School, University of Sussex, Brighton, BN1 9RH, UK
| | - Meichao Zhang
- CAS Key Laboratory of Behavioural Science, Institute of Psychology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Adam Turnbull
- Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, 94305, USA
| | - Delali Konu
- Department of Psychology, Durham University, Durham, DH1 3LE, UK
| | | | - Hao-Ting Wang
- Centre de Recherche de l'institut Universitaire de Gériatrie de Montréal (CRIUGM), Montreal, QC, H3W 1W5, Canada
| | - Robert Leech
- Centre for Neuroimaging Science, King's College, London, SE5 8AF, UK
| | - Ting Xu
- Center for the Developing Brain, Child Mind Institute, New York, 10022, USA
| | - Samyogita Hardikar
- Department of Neurology, Max Planck Institute for Human Cognitive and Brain Sciences, 04103, Leipzig, Germany
| | - Boris Bernhardt
- Montreal Neurological Institute, McGill University, Montreal, H3A 2B4, Canada
| | - Daniel Margulies
- Integrative Neuroscience and Cognition Center (UMR 8002, Centre National de la Recherche Scientifique (CNRS) and Université de Paris, 75006, Paris, France
| | | | - Jeffrey Wammes
- Psychology Department, Queen's University, Kingston, K7L 3N6, Canada
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Mulholland B, Goodall-Halliwell I, Wallace R, Chitiz L, Mckeown B, Rastan A, Poerio GL, Leech R, Turnbull A, Klein A, Milham M, Wammes JD, Jefferies E, Smallwood J. Patterns of ongoing thought in the real world. Conscious Cogn 2023; 114:103530. [PMID: 37619452 DOI: 10.1016/j.concog.2023.103530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 04/09/2023] [Accepted: 05/08/2023] [Indexed: 08/26/2023]
Abstract
Health and well-being are impacted by our thoughts and the things we do. In the laboratory, studies suggest specific task contexts impact thought processes. More broadly, this suggests the people we are with, the places we are in, and the activities we perform may influence our thought patterns. In our study, participants completed experience sampling surveys for five days in daily life. Principal component analysis decomposed this data to identify common "patterns of thought," and linear mixed modelling related these patterns to the participants' activities. Our study replicated the influence of socializing on patterns of thought and established that this is part of a broader set of relationships linking activities to how thoughts are organized in daily life. Our study suggests sampling thinking in the real world may help map thoughts to activities, and these "thought-activity" mappings could be useful to researchers and health care professionals interested in health and well-being.
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Affiliation(s)
| | | | - Raven Wallace
- Department of Psychology, Queen's University, Canada
| | - Louis Chitiz
- Department of Psychology, Queen's University, Canada
| | | | | | - Giulia L Poerio
- School of Psychology, University of Sussex, England, United Kingdom
| | - Robert Leech
- Department of Neuroimaging, King's College, England, United Kingdom
| | - Adam Turnbull
- Department of Psychiatry and Behavioral Sciences, Stanford University, USA; Department of Brain and Cognitive Sciences, University of Rochester, USA
| | | | | | - Jeffrey D Wammes
- Centre for Neuroscience Studies, Queen's University, Canada; Department of Psychology, Queen's University, Canada
| | | | - Jonathan Smallwood
- Centre for Neuroscience Studies, Queen's University, Canada; Department of Psychology, Queen's University, Canada
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Simola J, Silander T, Harju M, Lahti O, Makkonen E, Pätsi LM, Smallwood J. Context independent reductions in external processing during self-generated episodic social cognition. Cortex 2023; 159:39-53. [PMID: 36610108 DOI: 10.1016/j.cortex.2022.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 10/11/2022] [Accepted: 11/17/2022] [Indexed: 12/24/2022]
Abstract
Ongoing cognition supports behavioral flexibility by facilitating behavior in the moment, and through the consideration of future actions. These different modes of cognition are hypothesized to vary with the correlation between brain activity and external input, since evoked responses are reduced when cognition switches to topics unrelated to the current task. This study examined whether these reduced evoked responses change as a consequence of the task environment in which the experience emerges. We combined electroencephalography (EEG) recording with multidimensional experience sampling (MDES) to assess the electrophysiological correlates of ongoing thought in task contexts which vary on their need to maintain continuous representations of task information for satisfactory performance. We focused on an event-related potential (ERP) known as the parietal P3 that had a greater amplitude in our tasks relying on greater external attention. A principal component analysis (PCA) of the MDES data revealed four patterns of ongoing thought: off-task episodic social cognition, deliberate on-task thought, imagery, and emotion. Participants reported more off-task episodic social cognition and mental imagery under low external demands and more deliberate on-task thought under high external task demands. Importantly, the occurrence of off-task episodic social cognition was linked to similar reductions in the amplitude of the P3 regardless of external task. These data suggest the amplitude of the P3 may often be a general feature of external task-related content and suggest attentional decoupling from sensory inputs are necessary for certain types of perceptually-decoupled, self-generated thoughts.
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Affiliation(s)
- Jaana Simola
- Helsinki Collegium for Advanced Studies (HCAS), University of Helsinki, Fabianinkatu 24 (P.O. Box 4), 00014 University of Helsinki, Finland; Department of Education, University of Helsinki, Siltavuorenpenger 3A (P.O. Box 9), 00014 University of Helsinki, Finland; Cognitive Brain Research Unit, University of Helsinki, Siltavuorenpenger 5A (P.O. Box 9), 00014 University of Helsinki, Finland.
| | - Timo Silander
- Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Haartmaninkatu 8 (P.O. Box 63), 00014 University of Helsinki, Finland
| | - Minna Harju
- Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Haartmaninkatu 8 (P.O. Box 63), 00014 University of Helsinki, Finland
| | - Outi Lahti
- Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Haartmaninkatu 8 (P.O. Box 63), 00014 University of Helsinki, Finland
| | - Emilia Makkonen
- Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Haartmaninkatu 8 (P.O. Box 63), 00014 University of Helsinki, Finland
| | - Leea-Maria Pätsi
- Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Haartmaninkatu 8 (P.O. Box 63), 00014 University of Helsinki, Finland
| | - Jonathan Smallwood
- Department of Psychology, Queen's University, Humphrey Hall, 62 Arch Street, Kingston, Ontario K7L 3N6, Canada
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Lan Z, Xu S, Yu X, Yu Z, Li M, Chen F, Liu Y, Wang T, Wu Y, Gan Y, Jiang G. Functional Connectivity Underlying Symptoms in Preschool Boys With Autism: A Resting-State Functional Magnetic Resonance Imaging Study. Front Neurosci 2022; 16:844821. [PMID: 35495045 PMCID: PMC9047045 DOI: 10.3389/fnins.2022.844821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 03/23/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundSingle-sex children have been regarded as one of the best subjects to understand the abnormal development patterns of autism spectrum disorders (ASDs). However, the functional connectivity (FC) behind their symptoms is still unknown.MethodsBased on FC analysis, the acquired resting-state functional magnetic resonance imaging (rs-fMRI) data sets, including 86 boys with ASD and 54 normal controls (NC), were used to detect the neural synchronous activity between brain regions. Pearson correlation analysis was used to evaluate the relationship between the abnormal FC value and clinical features.ResultsIndividuals with ASD showed enhanced FC between the right calcarine and the right lingual gyrus (LG). The right medial orbital frontal cortex also showed increased FC with bilateral inferior temporal gyrus (ITG) [two-tailed, voxel-level p < 0.001, gaussian random field (GRF) correction, cluster-level p < 0.05]. We did not find a correlation between the abnormal FC value and clinical scales.ConclusionOur study reveals a possible relationship between atypical visual attention and poor learning ability in subjects with ASD, and delayed social language development may be a secondary symptom to ASD.
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Affiliation(s)
- Zhihong Lan
- Department of Medical Imaging, Zhuhai People’s Hospital, Zhuhai Hospital Affiliated With Jinan University, Zhuhai, China
| | - Shoujun Xu
- Department of Radiology, Shenzhen Children’s Hospital, Shenzhen, China
| | - Xiangrong Yu
- Department of Medical Imaging, Zhuhai People’s Hospital, Zhuhai Hospital Affiliated With Jinan University, Zhuhai, China
| | - Zhenjie Yu
- Department of Medical Imaging, Zhuhai People’s Hospital, Zhuhai Hospital Affiliated With Jinan University, Zhuhai, China
| | - Meng Li
- Department of Medical Imaging, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Feng Chen
- Department of Medical Imaging, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Yu Liu
- Department of Medical Imaging, Zhuhai People’s Hospital, Zhuhai Hospital Affiliated With Jinan University, Zhuhai, China
| | - Tianyue Wang
- Department of Medical Imaging, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Yunfan Wu
- Department of Medical Imaging, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Yungen Gan
- Department of Radiology, Shenzhen Children’s Hospital, Shenzhen, China
- *Correspondence: Yungen Gan,
| | - Guihua Jiang
- Department of Medical Imaging, Guangdong Second Provincial General Hospital, Guangzhou, China
- Guihua Jiang,
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Saponaro S, Giuliano A, Bellotti R, Lombardi A, Tangaro S, Oliva P, Calderoni S, Retico A. Multi-site harmonization of MRI data uncovers machine-learning discrimination capability in barely separable populations: An example from the ABIDE dataset. NEUROIMAGE: CLINICAL 2022; 35:103082. [PMID: 35700598 PMCID: PMC9198380 DOI: 10.1016/j.nicl.2022.103082] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 06/06/2022] [Accepted: 06/06/2022] [Indexed: 11/25/2022] Open
Abstract
Multi-site MRI data encode confounding information which may mask case-control differences. The impact of the NeuroHarmonize method is evaluated in the ASD-control classification. We verified the successful removal of the site effect by the harmonization protocol. The increment in the classification performance is quantified after data harmonization. We identified the anatomical features that contributed to the two-class separation.
Machine Learning (ML) techniques have been widely used in Neuroimaging studies of Autism Spectrum Disorders (ASD) both to identify possible brain alterations related to this condition and to evaluate the predictive power of brain imaging modalities. The collection and public sharing of large imaging samples has favored an even greater diffusion of the use of ML-based analyses. However, multi-center data collections may suffer the batch effect, which, especially in case of Magnetic Resonance Imaging (MRI) studies, should be curated to avoid confounding effects for ML classifiers and masking biases. This is particularly important in the study of barely separable populations according to MRI data, such as subjects with ASD compared to controls with typical development (TD). Here, we show how the implementation of a harmo- nization protocol on brain structural features unlocks the case-control ML separation capability in the analysis of a multi-center MRI dataset. This effect is demonstrated on the ABIDE data collection, involving subjects encompassing a wide age range. After data harmonization, the overall ASD vs. TD discrimination capability by a Random Forest (RF) classifier improves from a very low performance (AUC = 0.58 ± 0.04) to a still low, but reasonably significant AUC = 0.67 ± 0.03. The performances of the RF classifier have been evaluated also in the age-specific subgroups of children, adolescents and adults, obtaining AUC = 0.62 ± 0.02, AUC = 0.65 ± 0.03 and AUC = 0.69 ± 0.06, respectively. Specific and consistent patterns of anatomical differences related to the ASD condition have been identified for the three different age subgroups.
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Habata K, Cheong Y, Kamiya T, Shiotsu D, Omori IM, Okazawa H, Jung M, Kosaka H. Relationship between sensory characteristics and cortical thickness/volume in autism spectrum disorders. Transl Psychiatry 2021; 11:616. [PMID: 34873147 PMCID: PMC8648722 DOI: 10.1038/s41398-021-01743-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 11/17/2021] [Accepted: 11/24/2021] [Indexed: 11/09/2022] Open
Abstract
Individuals with autism spectrum disorders (ASDs) exhibit atypical sensory characteristics, impaired social skills, deficits in verbal and nonverbal communication, and restricted and repetitive behaviors. The relationship between sensory characteristics and brain morphological changes in ASD remains unclear. In this study, we investigated the association between brain morphological changes and sensory characteristics in individuals with ASD using brain image analysis and a sensory profile test. Forty-three adults with ASD and 84 adults with typical development underwent brain image analysis using FreeSurfer. The brain cortex was divided into 64 regions, and the cortical thickness and volume of the limbic system were calculated. The sensory characteristics of the participants were evaluated using the Adolescent/Adult Sensory Profile (AASP). Correlation analysis was performed for cortical thickness, limbic area volume, and AASP scores. In the ASD group, there was a significant positive correlation between visual sensory sensitivity scores and the right lingual cortical thickness (r = 0.500). There were also significant negative correlations between visual sensation avoiding scores and the right lateral orbitofrontal cortical thickness (r = -0.513), taste/smell sensation avoiding scores and the right hippocampal volume (r = -0.510), and taste/smell sensation avoiding scores and the left hippocampal volume (r = -0.540). The study identified associations among the lingual cortical thickness, lateral orbitofrontal cortical thickness, and hippocampal volume and sensory characteristics. These findings suggest that brain morphological changes may trigger sensory symptoms in adults with ASD.
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Affiliation(s)
- Kaie Habata
- grid.163577.10000 0001 0692 8246Department of Neuropsychiatry, University of Fukui, Eiheiji, Fukui, Japan
| | - Yongjeon Cheong
- grid.452628.f0000 0004 5905 0571Cognitive Science Research Group, Korea Brain Research Institute, Daegu, South Korea
| | - Taku Kamiya
- grid.163577.10000 0001 0692 8246Department of Neuropsychiatry, University of Fukui, Eiheiji, Fukui, Japan
| | - Daichi Shiotsu
- grid.163577.10000 0001 0692 8246Department of Neuropsychiatry, University of Fukui, Eiheiji, Fukui, Japan
| | - Ichiro M. Omori
- grid.163577.10000 0001 0692 8246Department of Neuropsychiatry, University of Fukui, Eiheiji, Fukui, Japan
| | - Hidehiko Okazawa
- grid.163577.10000 0001 0692 8246Biomedical Imaging Research Center, University of Fukui, Eiheiji, Fukui, Japan ,grid.163577.10000 0001 0692 8246Research Center for Child Mental Development, University of Fukui, Eiheiji, Fukui, Japan ,grid.163577.10000 0001 0692 8246Division of Developmental Higher Brain Functions, Department of Child Development, United Graduate School of Child Development, University of Fukui, Japan, Eiheiji, Fukui, Japan
| | - Minyoung Jung
- Cognitive Science Research Group, Korea Brain Research Institute, Daegu, South Korea.
| | - Hirotaka Kosaka
- Department of Neuropsychiatry, University of Fukui, Eiheiji, Fukui, Japan. .,Research Center for Child Mental Development, University of Fukui, Eiheiji, Fukui, Japan. .,Division of Developmental Higher Brain Functions, Department of Child Development, United Graduate School of Child Development, University of Fukui, Japan, Eiheiji, Fukui, Japan.
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Bled C, Guillon Q, Soulières I, Bouvet L. Thinking in pictures in everyday life situations among autistic adults. PLoS One 2021; 16:e0255039. [PMID: 34293061 PMCID: PMC8297849 DOI: 10.1371/journal.pone.0255039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 07/09/2021] [Indexed: 11/19/2022] Open
Abstract
Autistic individuals are often described as thinking in pictures. The aim of this study was to investigate the phenomenological characteristics of mental representations and inner experiences of autistic individuals. A total of 39 autistic adults and 80 control adults answered an online questionnaire. Autistic participants reported a more frequent use of visual mental representations than controls for different types of everyday situations. Moreover, autistic individuals defined their visual mental representations as more detailed than control participants. Furthermore, when describing their inner experiences, autistic participants used perceptive visual themes whereas control participants relied more on the description of events and memories. Our results support the hypothesis that some autistic individuals indeed “think in pictures”. We discuss the impact of such a visual way of thinking in daily life.
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Affiliation(s)
- Clara Bled
- Laboratoire CERPPS-E.A. 7411, Université Toulouse Jean Jaurès, Toulouse, France
- * E-mail:
| | - Quentin Guillon
- Laboratoire CERPPS-E.A. 7411, Université Toulouse Jean Jaurès, Toulouse, France
| | - Isabelle Soulières
- Psychology Department, C.P. 8888 Succursale Centre-Ville, Université du Québec à Montréal, Montreal, Canada
| | - Lucie Bouvet
- Laboratoire CERPPS-E.A. 7411, Université Toulouse Jean Jaurès, Toulouse, France
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