Une subvention attribuée au LPVS-UQO pour un nouveau projet!

Le LPVS-UQO a obtenu une subvention de recherche dans le cadre du concours de subventions pilotes du Centre de recherche en neurosciences cognitives de l’Université du Québec à Montréal (NeuroQAM).

Dans le cadre de ce concours, Dr Fiset et Dre Blais en collaboration avec Dr Saint-Amour de l’UQAM ont mis sur pied un projet intitulé «l’Impact de l’amblyopie sur le traitement de visages : Une étude psychophysique et électrophysiologique». Ainsi ce projet vise à mieux comprendre les conséquences de l’amblyopie sur la perception des visages au niveau comportemental et neurophysiologique.

Nous sommes bien heureux de cette nouvelle et enthousiastes d’entamer ce projet passionnant !

Des diplômes et distinctions pour les étudiants du LPVS

Samedi dernier a été marqué par la cérémonie de la collation des grades organisée pas l’Université du Québec en Outaouais, lors de laquelle les étudiants du LPVS se sont démarqués.

Félicitation à nos doctorantes:

Jessica Royer

Essai doctoral intitulé : Différences individuelles dans les habiletés d’identification et l’utilisation de l’information visuelle des visages

L’identification d’un visage requiert l’extraction fine et précise des informations contenues dans le stimulus; or, tous les individus ne sont pas aussi habiles pour accomplir cette tâche. Nos travaux ont permis de démontrer que la stratégie d’extraction de l’information visuelle lors d’une tâche d’identification de visages, particulièrement l’utilisation de la région des yeux, est liée au niveau d’habileté individuel à reconnaître les visages.

Cette essai était dirigé par docteur Daniel Fiset et codirigée par docteure Caroline Blais.

Youna Dion-Marcoux


Essai doctoral intitulé : Impact du vieillissement sur les stratégies perceptives utilisées en reconnaissance d’expressions faciales d’émotion

Les données de la littérature scientifique suggèrent la présence d’une diminution des habiletés de reconnaissances des expressions faciales lors du vieillissement normal. Cette thèse visait en premier lieu à évaluer les performances en reconnaissance des expressions faciales chez les personnes âgées avec des stimuli appartenant aux deux groupes d’âge. Elle avait comme second objectif de vérifier l’impact de l’âge sur les stratégies perceptives utilisées lors du traitement des expressions faciales par nos deux groupes de participants.

Cet essai était dirigé par docteure Caroline Blais. et codirigé par docteurs Daniel Fiset et Hélène Forget.

Marie-Josée Roy


Essai doctoral intitulé : L’impact de l’anxiété sociale sur les stratégies perceptives sous-jacentes au traitement des expressions faciales d’émotion

La capacité à développer et à maintenir des liens sociaux et plus spécifiquement à comprendre les émotions semble déficitaire dans plusieurs pathologies psychiatriques. Dans l’anxiété sociale, des performances mitigées au niveau de la reconnaissance des expressions faciales d’émotion ont été observées, ce qui pourrait s’expliquer par une sur-activation de l’amygdale pour certaines expressions faciales. Puisque l’amygdale modulerait les stratégies perceptives utilisées en reconnaissance d’expressions faciales, il est possible que les stratégies perceptives utilisées par les anxieux sociaux diffèrent de celles des participants contrôles. Cet essai doctoral visait ainsi à mieux comprendre les stratégies perceptives sous-jacentes à la reconnaissance des expressions faciales d’émotion chez un échantillon d’adultes d’hommes et de femmes rapportant
vivre de l’anxiété sociale. Plus précisément, cet essai visait à vérifier si les participants anxieux sociaux différaient des participants contrôles sur leur utilisation des stratégies perceptives en reconnaissance des six expressions faciales de base : le dégoût, la colère, la peur, la joie, la surprise et la tristesse.

Cet essai était dirigé par docteur Daniel Fiset.

Félicitation à nos Bacheliers: Isabelle Charbonneau, Joël Guérette et Marie-Pier Plouffe-Demers.

Une mention toute spéciale à Isabelle pour l’obtention de la prestigieuse médaille d’argent de la Gouverneure générale du Canada qui lui a été décernée au nom de son Excellence, la très honorable Julie Payette, pour avoir  terminé son baccalauréat en psychologie avec une moyenne cumulative de 4,26/4,30.

Nous sommes très très fiers de vous et vous souhaitons encore bien des découvertes et réussites pour les années à venir.

Plein de bonnes nouvelles pour le LPVS

Plusieurs membres du LPVS se sont distingués aux concours de bourses des grands organismes subventionnaires cette année.

Deux étudiantes graduées se sont démarquées entre autres Camille Saumure qui a obtenu la prestigieuse bourse d’études supérieures du Canada Joseph-Armand-Bombardier du Conseil de Recherche en Sciences Humaines (CRSH)

Félicitation aussi à nos récipiendaires et nouveaux candidats au doctorat, Joël Guérette candidat au Phd profil recherche à l’UQAM ( Bourse de maîtrise en recherche (B1) du FRQSC), Marie-Pier Plouffe-Demers candidate au PhD profil recherche à l’UQAM (Bourse de maîtrise en recherche (B1) du FRQNT et BESC Maitrise du CRSH), Isabelle Charbonneau candidate au dPsy en neuropsychologie à l’UQO (Bourse de maîtrise en recherche (B1) du FRQNT et BESC Maitrise du  CRSNG) et Valérie Plouffe candidate au dPsy en neuropsychologie à l’UQO (BESC Maitrise du CRSNG)

Cet été encore  le laboratoire a aussi accueilli plusieurs autres boursiers du premier cycle , Marie-Pier Plouffe-DemersIsabelle CharbonneauMichael N’GuiambaGuillaume Lalonde-Beaudoin, Francis GingrasCassandra Voyer, Jasmine MichaudAlexandra Lévesque Lacasse et Virginie Leblanc dans le cadre du programme de Bourses de recherche de premier cycle octroyées pas le Conseil de Recherche en Sciences Naturelles et en Génie (CRSNG).

Finalement nous tenons à souligner l’excellence de  Joël GuéretteIsabelle Charbonneau, et Marie-Pier Plouffe-Demers, pour l’obtention de la Bourse d’excellence du premier cycle de la fondation UQO ainsi que  Gabrielle Dugas pour la Bourse d’excellence du deuxième cycle de la fondation UQO.

Tous vos efforts auront porté fruits. Nous sommes très fiers de vous!

C’est maintenant reparti pour une nouvelle année 🙂

Congrès de la Vision science society 2018

Voici un aperçu des projets qui ont été présentés par le LPVS au prestigieux congrès de Vision Science Society qui rassemble des chercheurs d’un large éventail de disciplines contribuant à l’avancement scientifique en vision dont la psychologie visuelle et perceptive, les neurosciences, la vision computationnelle ainsi que la psychologie cognitive. Le contenu scientifique des présentations reflète la diversité des sujets du domaine de la vision allant du codage visuel à la perception, en passant par le contrôle visuel de l’action et le développement de nouvelles méthodologies en psychologie cognitive, en vision par ordinateur ou en neuroimagerie.

Séance d’affiche – Visages et mécanismes neuronaux

N170 sensitivity to the horizontal information of facial expressions

Justin Duncan1,2, Frédéric Gosselin3 , Caroline Blais1 , Daniel Fiset1
1 Université du Québec en Outaouais, 2 Université du Québec à Montréal, 3 Université de Montréal

 

VOIR AFFICHE

 

The N170 event-related potential, which is preferentially tuned to faces (see for review Rossion, 2014), has been linked with processing of the eyes (Rousselet, Ince, van Rijsbergen & Schyns, 2014), of diagnostic facial features of emotions (Schyns, Petro & Smith, 2007), and of horizontal facial information (Jacques, Schiltz & Goffaux, 2014). Recent findings have shown that horizontal information is highly diagnostic of the basic facial expressions, and this link is best predicted by utilization of the eyes (Duncan et al., 2017). Given these findings, we were interested in how N170 amplitude relates with spatial orientations in a facial expressions categorization task. Five subjects each completed 7,000 trials (1,000 per expression) while EEG activity was measured at a 256 Hz sampling rate. Faces were randomly filtered with orientation bubbles (Duncan et al., 2017) and presented on screen for 150ms. Performance was maintained at 57.14%, using QUEST (Watson & Pelli, 1983) to modulate stimulus contrast. The signal was referenced to the mastoid electrodes and bandpass filtered (1-30 Hz). It was epoched between -300 and 700 ms relative to stimulus onset, and eye movements were removed using ICA. Single-trial spherical spline current source density (CSD) was computed using the CSD toolbox (Kayser & Tenke, 2006; Tenke & Kayser, 2012). Our main analysis consisted in conducting a multiple linear regression of singletrial orientation filters on PO8 voltages at each time point. The statistical threshold (Zcrit= 3.6, p< .05, two-tailed) was established with the Stat4CI toolbox (Chauvin et al., 2005). We found a negative correlation between horizontal information availability and voltage (Zmin= -5.43, p< .05) in the 50ms leading up to the N170’s peak. Consistent with the proposition that the N170 component reflects the integration of diagnostic information (Schyns, Petro & Smith, 2007), the association between horizontal information and amplitude was strongest 25 ms before the peak, and completely disappeared at peak.

Remerciement: Conseil de recherches en sciences naturelles et en génie du Canada (CRSNG)

 

Cortical activation of fearful faces requires central resources: multitasking processing deficits revealed by event-related potentials

Amélie Roberge1 , Justin Duncan2-3, Ulysse Fortier-Gauthier1 , Daniel Fiset2 , Benoit Brisson1
1 Département de psychologie, Université du Québec à Trois-Rivières, 2 Département de Psychoéducation et de Psychologie, Université du Québec en Outaouais, 3 Département de Psychologie, Université du Québec à Montréal

 

To investigate if emotional face processing requires central attention, a psychological refractory period paradigm was combined with the event-related potential (ERP) technique. Participants were asked to categorize tones as high (900 Hz or 2000 Hz) or low (200 Hz or 426 Hz) as quickly and accurately as possible and then to indicate if a face expressed fear or a neutral expression. Stimulus onset asynchrony (SOA) between the presentation of the tone and the face was manipulated (SOA: 300, 650 or 1000ms) to vary the amount of central attention available to perform the face expression task (less central attention available at short than long SOAs). The amplitude of frontally distributed ERP components associated to emotional face processing (computed as the difference between fear and neutral conditions: Eimer & Holmes, 2007) were measured at all SOAs. The first component (175-225 ms post-visual stimulus onset), which is thought to reflect rapid initial detection of the emotion, was not affected by SOA, F(2,50) = 2.24, p = .12. However, a significant effect of SOA was observed on a later sustained frontal positivity (300-400 ms post-visual stimulus onset), that is thought to reflect the conscious evaluation of emotional content, F(2,50) = 5.33, p = .01. For both components, no effect of SOA was observed in a subsequent control experiment in which both stimuli were presented but only a response to the expression of the face was required, F(2,32) = 2.80, p = .10 and F(2,32) = 1.26, p = .30. These results suggest that the rapid perceptual detection of the facial expression is independent of central attention. In contrast, the subsequent cognitive stage of conscious evaluation of emotional content does require central attention to proceed.

Remerciements: Conseil de recherches en sciences naturelles et en génie du Canada (CRSNG), Fonds québécois de la recherche sur la nature et les technologies (FRQNT)

 

Séance d’affiche – Visages et émotions

Spatial frequencies for accurate categorization and discrimination of facial expressions

Isabelle Charbonneau1, Stéphanie Cormier 1 , Joël Guérette1 , Marie-Pier Plouffe-Demers1 , Caroline Blais1 , Daniel Fiset1 Université du Québec en Outaouais

 

VOIR LE AFFICHE

 

studies have examined the role of spatial frequencies (SFs) in facial expression perception. However, most of these studies used arbitrary cut-off to isolate the impact of low and high SFs (De Cesarei & Codispoti, 2012) thus removing possible contribution of mid-SFs. This present study aims to reveal the diagnostic SFs for each basic emotion as well as neutral using SFs Bubbles (Willenbockel et al., 2010). Forty participants were tested (20 in a categorization task, 20 in a discrimination task; 4200 trials per participant). In the categorization task, subjects were asked to identify the perceived emotion among all the alternatives. In the discrimination task, subjects were asked, in a block-design setting (block order was counterbalanced across participants), to discriminate between a target emotion (e.g fear) and all other emotions. Mean accuracy was maintained halfway between chance (i.e. 12.5% and 50% correct for each task, respectively) and perfect accuracy. In both tasks, accuracy for happiness and surprise is associated with low-SFs (peaking at around 5 cycles per face (cpf); Zcrit=3.45, p< 0.05 for all analysis) whereas accuracy for sadness and neutrality is associated with mid-SFs (peaking between 11.5 and 15 cpf for both tasks). Interestingly, the facial expressions of fear and anger reveal significantly different patterns of use across task. Whereas their correct categorization is correlated with the presence of mid-to-high SFs (peaking at 14 and 20 cpf for angry and fear, respectively) their accurate discrimination is correlated with the utilization of lower SFs (peaking at 4 and 3.7 cpf). These results suggest that the visual system is able to use low-SF information to detect and discriminate social threatening cues. However, higher-SFs are probably necessary in a multiple-choices categorization task to allow fine-grained discrimination.

Remerciement: Conseil de recherches en sciences naturelles et en génie du Canada (CRSNG)

 

Spatial frequencies for the visual processing of the facial expression of pain

Joël Guérette1 , Stéphanie Cormier1 , Isabelle Charbonneau1 , Caroline Blais1 , Daniel Fiset1 ;
1 Département de psychoéducation et de psychologie, Université du Québec en Outaouais

 

VOIR AFFICHE

 

Recent studies suggest that low spatial frequencies (SFs) are particularly important for the visual processing of the facial expression of pain (Wang et al., 2015; 2017). However, these studies used arbitrary cut-off to isolate the impact of low (under 8 cycles per faces (cpf)) and high (over 32 cpf) SFs, thus removing any contribution of the mid-SFs. Here we compared the utilization of SFs for pain and other basic emotions in three tasks (20 participants per task), that is 1) a facial expression recognition task with all basic emotions and pain, 2) a facial expression discrimination task where one target expression needed to be discriminated from the others and 3) a facial expression discrimination task with only two choices (i.e. fear vs. pain, pain vs. happy). SF Bubbles were used (Willenbockel et al., 2010), a method which randomly samples SFs on a trial-by-trial basis, enabling us to pinpoint the SFs that are correlated with accuracy. In the first task, accurate categorization of pain was correlated with the presence of a large band of SFs ranging from 4.3 to 52 cpf peaking at 14 cpf (Zcrit=3.45, p< 0.05 for all analysis). In the second task, the correct discrimination of pain was correlated with the presence of a band of SFs ranging from 5 to 20 cpf peaking at 11 cpf. In the third task, we computed the classification vectors for pain-happiness and pain-fear conditions and revealed the overlapping SFs. In this task, SFs ranging from 2.7 to 13 cpf peaking at 7.3 cpf are significantly correlated with pain discrimination. Our results highlight the importance of the mid-SFs in the visual processing of the facial expression of pain and suggest that any method removing these SFs offers an incomplete account of SFs diagnosticity.

Remerciement: Conseil de recherches en sciences naturelles et en génie du Canada (CRSNG)

 

Séance d’affichage – Visages et différences individuelles

Task-specific extraction of horizontal information in faces

Gabrielle Dugas1 , Jessica Royer1 , Justin Duncan1, 2, Caroline Blais1 , Daniel Fiset1 ;
1 Université du Québec en Outaouais, 2 Université du Québec à Montréal

 

VOIR AFFICHE

 

Horizontal information is crucial for accurate face processing (Goffaux & Dakin, 2010). Individual differences in horizontal tuning were shown to correlate with aptitude levels in both face identification (Pachai, Sekuler & Bennett, 2013) and facial expression categorization (Duncan et al., 2017).These results thus indicate that the same visual information correlates with abilities in two different face processing tasks. Here, we intended to verify if the ability to extract horizontal information generalizes from one task to the other at the individual level. To do this, we asked 28 participants to complete both a 10-AFC face identification task and a race categorization (Caucasian vs. African-American) task (600 trials per task). To find out which parts of the orientation spectrum were associated with accuracy, images were randomly filtered with orientation bubbles (Duncan et al., 2017). We then performed, for each subject, what amounts to a multiple linear regression of orientation sampling vectors (independent variable) on response accuracy scores (dependent variable). A group classification vector (CV) was created by first summing individually z-scored CVs across subjects, and then dividing the outcome by √n, where n is the sample size. These analyses, performed separately for each task, show that horizontal information is highly diagnostic for both face identification (Zmax = 24.8) and race categorization (Zmax = 22.9), all ps < .05 and Group CVs of both task were highly correlated, r= .96, p< .001, showing high similarity in visual strategies at the group level. At the individual level, however, horizontal tuning measures (as per Duncan et al., 2017) in the identification and race categorization tasks did not correlate, r = -0.02, ns. Our results thus show that, although horizontal information is diagnostic for both tasks, individual differences in the extraction of this information appears to be task dependent.

Remerciement: Conseil de recherches en sciences naturelles et en génie du Canada (CRSNG)

 

Individual differences in face identification correlate with face detection ability

Virginie Burns1, Guillaume Lalonde-Beaudoin1 , Justin Duncan1,2, Stéphanie Bouchard1 , Caroline Blais1 , Daniel Fiset1
1 Département de Psychoéducation et de Psychologie, Université du Québec en Outaouais, 2 Département de Psychologie, Université du Québec à Montréal

 

VOIR AFFICHE

 

Our brain is tuned to detect, identify and integrate social information conveyed by faces. Despite the crucial role of face detection, little is known about the visual processes underlying this endeavor and how it is related to face identification. Recently, Xu and Biederman (2014) presented a case of acquired prosopagnosia with a face-specific detection impairment. Compared with controls, MJH needs significantly more visual signal for face detection, but not for car detection. Thus, we hypothesized that there may exist a correlation between face identification and detection proficiency in normal adults. Forty-five participants (24 women) performed the Cambridge Face Memory Test (CFMT; Duchaine, & Nakayama, 2006), the Cambridge Face Perception Test (CFPT; Duchaine, Germine, & Nakayama, 2007), and the Glasgow Face Memory Test (GFMT; Burton, White, & McNeil, 2010). They also completed two detection tasks : a face detection task and a car detection task. The power spectra were equalized across face and car stimuli. Individual face identification abilities were calculated by computing a weighted average of CFMT, GFMT, and CFPT scores (the latter of which was negatively scored). Face and car detection abilities were reflected by their respective detection thresholds, defined as phase spectrum coherence (as per Xu and Biederman, 2014). We observed a negative correlation between face identification ability scores and face detection thresholds (r = -.47 p< .01), which remained significant when computing the Spearman correlation (rs = -.42, p< .01). The correlation also remained significant when controlling for car detection ability (r = -.371, p< .05). Our results suggest that face detection and face identification share some perceptual or cognitive resources. More research will be needed to better understand what exactly is shared between these two tasks.

Remerciement: Conseil de recherches en sciences naturelles et en génie du Canada (CRSNG)

 

Séance d’affiche – Attention et différences individuelles

 

Evidence for a broader allocation of attention in emmetropes over myopes during three visual processing tasks

Amanda Estéphan1,2, Carine Charbonneau1 , Hana Furumoto-Deshaies1 , Marie-Pier PlouffeDemers1 , Daniel Fiset1 , Roberto Caldara3 , Caroline Blais1 ;
1 Département de Psychoéducation et Psychologie, Université du Québec en Outaouais, 2 Département de Psychologie, Université du Québec à Montréal, 3 Department of Psychology, University of Fribourg

 

VOIR AFFICHE

 

Last year (VSS, 2017), we explored the impact of myopia on visual attention as a possible explanation for the perceptual differences observed between Easterners and Westerners: namely, that Easterners have a larger global advantage than Westerners in a Navon Task (McKone et al., 2010); fixate less the eyes and mouth, and more the centre of the face during its processing (Blais et al., 2008); and tend to process faces in lower spatial frequencies (Tardif et al., 2017). Myopes and emmetropes were tested using Navon’s paradigm to measure their ability to detect global versus local target letters, and the Spatial Frequency (SF) Bubbles method (Willenbockel et al., 2010a) to measure their use of SFs during a face identification task: we initially found unexpected results suggesting that emmetropes were better than myopes at detecting global letters and that they used lower SFs than the latter group to correctly identity faces. Here, we delved deeper into this inquiry: a greater number of participants were tested with Navon’s paradigm (myopes = 18; emmetropes = 29) and with SF Bubbles (myopes = 15; emmetropes = 18). In addition, we measured participants eye-movements during another face recognition task (myopes = 11; emmetropes = 9). In support of our previous findings, our new results indicate that emmetropes have a higher global processing bias than myopes [t(45) = -3.269; p = 0.002], and make greater use of lower SFs, between 4.3 to 5.7 cycles per face [Stat4CI (Chauvin et al., 2005): Zcrit=-3.196, p< 0.025]. Finally, our eye-movement results suggest that emmetropes fixate the center of the face to a greater extent than myopes [analysis with iMap4 (Lao et al., in press)]. These findings offer a new avenue to explore how myopes and emmetropes process information contained in visual stimuli.

Remerciement: Conseil de recherches en sciences naturelles et en génie du Canada (CRSNG)

 

Séance d’affiche – Visages: Culture, familiarité et effet de l’autre ethnie

Cultural differences in spatial frequency utilisation do not generalize across various object classes

Caroline Blais1 , Amanda Estéphan1, 2, Michael N’Guiamba N’Zie1 , Marie-Pier Plouffe-Demers1 , Ye Zhang3,4, Dan Sun3,4, Daniel Fiset1 ;
1 Psychology department, University of Quebec in Outaouais, 2 Psychology department, University of Quebec in Montreal, 3 Institute of Psychological Sciences, Hangzhou Normal University, 4 Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments

 

VOIR AFFICHE

 

Several studies have shown cultural differences in the fixation patterns observed during tasks of different nature, e.g. face identification (Blais et al., 2008; Kelly et al., 2011), race categorization (Blais et al., 2008), and recognition of visually homogeneous objects (Kelly et al., 2010). These differences suggest that Easterners deploy their attention more broadly and rely more on extrafoveal processing than Westerners (Miellet et al., 2013). This finding is in line with a dominant theory in the field suggesting that cultural differences in cognition, attention and perception may be related to social systems (Nisbett & Miyamoto, 2005). Specifically, Easterners, because they have evolved in a more collectivistic system, would deploy their attention more broadly than Westerners, who have evolved in a more individualistic system. However, studies revealing cultural differences in fixation patterns during face processing have been challenged by the findings that two fixations suffice for face recognition (Hsiao & Cottrell, 2008), and that early fixations are not modulated by culture (Or, Peterson & Eckstein, 2015). Since deploying attention over a broader area has been shown to modulate the spatial resolution, directly assessing the spatial frequency (SF) utilisation underlying stimulus recognition would help clarify the impact of culture on perceptual processing. Here, we present a set of four experiments in which the SF used by Easterners and Westerners were measured while they identified faces, discriminated familiar from unfamiliar faces, and categorized object and scenes. The results reveal that Easterners are tuned towards lower SF than Westerners when they identify faces and discriminate familiar from unfamiliar ones (Tardif et al., 2017), but use the same SF to categorize objects and scenes. Together, these results challenge the view that the exposition to different social systems leads to the development of different perceptual strategies generalizable to various object classes.

Remerciement: Conseil de recherches en sciences naturelles et en génie du Canada (CRSNG)

 

The impact of culture on visual strategies underlying the judgment of facial expressions of pain.

Camille Saumure1, Marie-Pier Plouffe-Demers1 , Daniel Fiset1 , Stéphanie Cormier1 , Dan Sun3,4, Zhang Ye3,4, Miriam Kunz2 , Caroline Blais1 ;
1 Département de psychoéducation et de psychologie, Université du Québec en Outaouais, 2 Department of General Practice and Elderly Care Medicine, University of Groningen, 3 Institute of Psychological Sciences, Hangzhou Normal University, 4 Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments

 

VOIR AFFICHE

 

Research has revealed that observers’ ability to recognize basic facial emotions expressed by individuals of another ethnic group is poor (Elfenbein, & Ambady, 2002), and that culture modulates the visual strategies underlying the recognition of basic facial expressions (Jack et al., 2009; Jack, Caldara, Schyns, 2012; Jack et al., 2012). Although it has been suggested that pain expression has evolved in order to be easily detected (Williams, 2002), the impact of culture on the visual strategies underlying the recognition of pain facial expressions remains underexplored. In this experiment, Canadians (N=28) and Chinese (N=30) participants were tested with the Bubbles method (Gosselin & Schyns, 2001) to compare the facial features used to discriminate between two pain intensities. Stimuli consisted of 16 face avatars (2 identities x 2 ethnicities x 4 levels of intensity difference) created with FACEGen and FACSGen. The amount of facial information needed to reach an accuracy rate of 75% was higher for Chinese (M=93.3, SD=25.04) than for Canadian participants (M=47.2, SD=48.02) [t(44.3)=-4.63, p< 0.001], suggesting that it was harder for Chinese to discriminate among two pain intensities. Classification images representing the facial features used by participants were generated separately for Asian and Caucasian faces. Statistical thresholds were found using the cluster test from Stat4CI (Chauvin et al, 2005; Zcrit=3.0; k=667; p< 0.05). Canadians used the eyes, the wrinkles between the eyebrows and the nose wrinkles/upper lip area with both face ethnicities. Chinese used the eye area with Asian faces, but no facial area reached significance with Caucasian faces. Compared with Chinese participants, Canadians relied more on the nose wrinkles area (Zcrit=3.0; k=824; p< 0.025). Together, these results suggest that culture impacts the visual decoding of pain facial expressions.

Remerciement: Conseil de Recherches en Sciences Humaines

 

Marie-Pier Plouffe-DemersThe impact of culture on the visual representation of pain facial expressions

Marie-Pier Plouffe Demers 1, Camille Saumure1 , Stéphanie Cormier1 , Daniel Fiset1 , Miriam Kunz2 , Dan Sun3,4, Zhang Ye3,4, Caroline Blais1 ;
1 Department of psychoeducation and psychology, Université du Québec en Outaouais, 2 Department of General Practice and Elderly Care Medicine, University of Groningen, 3 Institute of Psychological Sciences, Hangzhou Normal University, 4 Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments

 

VOIR AFFICHE

 

Some studies suggest that communication of pain is connected to the evolution of human race and has evolved in a way to increase an individual’s chance of survival (Williams, 2002). However, even though facial expressions of emotions have long been considered culturally universal (Izard, 1994; Matsumoto & Willingham, 2009), some studies revealed cultural differences in the perceptual mechanisms underlying their recognition (e.g. Jack et al., 2009; Jack et al., 2012). The present study aims to verify the impact of culture on the facial features that are stored by individuals in their mental representation of pain facial expressions. In that respect, observer-specific mental representations of 60 participants (i.e. 30 Caucasians, 30 Chineses) have been measured using the Reverse Correlation method (Mangini & Biederman, 2004). In 500 trials, participants chose, from two stimuli, the face that looked the most in pain. For each trial, both stimuli would consist of the same base face (i.e. morph between average Asian and Caucasian avatars showing low pain level) with random noise superimposed, one with a random noise pattern added, and the other the same pattern subtracted. We generated a classification image (CI) for each group by averaging noise patterns chosen by participants. The cultural impact on mental representations was measured by subtracting the Caucasian CI from the Chinese CI, to which was applied a Stat4CI cluster test (Chauvin et al., 2005). Results indicate significant differences in the mouth and left eyebrow areas (ZCrit=3.09, K=167, p< 0.025), and suggest a mental representation of pain facial expression of greater intensity for Chinese participants. Given that mental representations reflect expectations about the world based on past experiences (Jack et al., 2012), the results suggest that Chinese participants may have previously been exposed to facial expressions displaying greater pain intensities.

Remerciement: Conseil de Recherches en Sciences Humaines

Première édition de la journée scientifique du Groupe de Neurosciences Sociales à l’UQO

Vendredi dernier avait lieu la première édition de la journée scientifique sous le thème des neurosciences sociales. Cet événement était organisé conjointement par le GNS et le département de psychoéducation et de psychologie de l’UQO.

C’est ainsi que plusieurs laboratoires de l’UQO, dont le LPVS, ainsi que quelques laboratoires de l’Université du Québec à Trois-Rivières et de l’Université Laval ont pu présenter le fruit de leurs projets de recherche.

Mot de bienvenue de la directrice du GNS et codirectrice du LPVS Dre Caroline Blais.

Les étudiants se sont rassemblés en matinée pour venir discuter avec quelques étudiants gradués et professeurs de leurs parcours académiques dans le cadre d’un événement satellite.

De gauche à droite: Justin Duncan, Annie Bérubé, Geneviève Forest, Daniel Fiset et Gabrielle Dugas.

Plusieurs ateliers étaient mis à la disposition des participants et leurs ont permis de découvrir les outils méthodologiques utilisés en neurosciences sociales. Du LPVS  Marie-Pier Plouffe-Demers a d’ailleurs présenté la méthode de corrélation inversée et Francis Gingras la méthode de morphing.

Le GNS a aussi eu l’immense plaisir d’accueillir le Dr Philip Jackson, professeur titulaire à l’École de psychologie de la faculté des sciences sociales de l’Université Laval qui nous à chaleureusement présenté les corrélats cérébraux de l’empathie pour la souffrance d’autrui. Il a entre autres abordé un des facteurs qui a très peu été étudié et qui est pourtant très pertinent dans un contexte clinique, soit le degré d’exposition à la douleur d’autrui.

Le LPVS a aussi présenté un symposium portant sur les mécanismes perceptifs et neuronaux en reconnaissance de visages, organisé par Isabelle Charbonneau co-coordonnatrice du labo.

Isabelle Charbonneau: Fréquences spatiales utiles en reconnaissance d’expressions faciales

 

Virginie Burns: Les différences individuelles en détection de visages corrèlent avec les habiletés d’identification de visages

 

Gabrielle Dugas: L’extraction de l’information horizontale en traitement de visages est-elle ascendante ou descendante

 

Justin Duncan: Le traitement atténué des expressions faciales en double-tâche : une étude électrophysiologique

 

Dr Daniel Fiset: Le rôle de l’aire occipitale des visages en reconnaissance d’expressions faciales d’émotion

Quelques étudiantes du LPVS ont aussi relevé le défi de présenter un condensé de leur projet de recherche en moins de 5 minutes dans le cadre de la séance de « Give me five ».

Le trois présentations de Camille, Marie-Pier et Amanda portaient sur l’impact de la culture sur l’extraction de l’information visuelle, plus spécifiquement dans la reconnaissance de visages et l’expression faciale de douleur.

Plusieurs communications affichées du LPVS ont aussi été présentées.

Guillaume: L’influence des orientations spatiales sur les capacités de lecture
Marie-Pier: Avantage dynamique: les processus visuels sous-jacents à la reconnaissance d’expressions faciales d’émotion
– Frederika: Une étude du jugement de l’authenticité des sourires dynamiques et statiques chez les hommes face à un stress psychosocial
Andrea: L’impact de l’ethnie du visage sur la représentation mentale de l’expression faciale de douleur
Carine: Le lien entre la représentation mentale de l’expression faciale de douleur et l’estimation de douleur chez autrui
Isabelle: Expérience perceptive et mécanismes visuels d’extraction des orientations spatiales : Lien avec la taille de l’effet de l’autre ethnie
Joël: Les fréquences spatiales pour le traitement visuel de l’expression faciale de douleur. et Crier après l’arbitre, une stratégie de modification de la prise de décision efficace au baseball
Michael: L’impact de la culture sur le traitement visuel des scènes et des objets

Nous aimerions ainsi remercier tous les étudiants pour leur participation et souligner le travail de Amanda Estephan qui s’est vue remettre le prix pour meilleure communication orale et Joël Guérette qui a gagné le prix de la meilleure communication affichée!

Bravo à tous!

Le LPVS se démarque au congrès annuel de la SQRP

Plusieurs étudiants se sont démarqués le week-end dernier lors de la tenue du 40e congrès annuel de la Société Québécoise pour la Recherche en Psychologie.

Nous tenons spécialement à féliciter Joël Guérette qui s’est vu décerner le prix de la meilleure communication orale toutes catégories confondues. Son projet d’étude visant à mesurer si le fait d’argumenter avec l’arbitre avantage ou non une équipe sportive. Cet effet pouvant être mesuré par une diminution de la taille de la zone de prises de l’équipe ayant argumenté.

Nous tenons aussi à souligner la nomination d’Isabelle Charbonneau à titre de représentante étudiante au conseil d’administration de la SQRP. C’est elle qui sera la voix étudiante au cours des deux années à venir. Bonne chance dans ton mandat Isabelle. Nous avons hâte de voir ce que tu nous réserves.

 

Une étudiante du LPVS remporte la première place au concours « Ma thèse en 180 secondes » de l’UQO

Félicitation à Camille Saumure, étudiante en deuxième année de son doctorat en neuropsychologie qui a séduit les membres du jury pour remporter les honneurs de cette édition 2018 de MT180 avec la présentation intitulée Lequel de ces deux visages exprime le plus de douleur ? Ce projet de recherche porte sur l’impact de la culture sur les mécanisme perceptifs sous-jacents à la reconnaissance de l’expression faciale de douleur.

Camille Saumure représentera l’UQO à la grande finale nationale qui se tiendra dans le cadre 86e Congrès de l’Association francophone pour le savoir (ACFAS), qui se déroule du 7 au 11 mai 2018, à l’Université du Québec à Chicoutimi (UQAC).

Rappelons que deux étudiantes du LPVS se sont rendues en finale nationale et internationale ces dernières années : Olivier Paquin a participé à la finale nationale en 2014 et Camille Daudelin-Peltier a participé à la finale à Paris, en 2015.

Encore une fois, bravo Camille!!!

VSS 2017

Encore une fois cette année, plusieurs étudiants du LPVS auront pris part au congrès annuel de Vision Science Society qui rassemble des chercheurs d’un large éventail de disciplines contribuant à l’avancement scientifique en vision dont la psychologie visuelle et perceptive, les neurosciences, la vision computationnelle ainsi que la psychologie cognitive. Le contenu scientifique des présentations reflète la diversité des sujets du domaine de la vision allant du codage visuel à la perception, en passant par le contrôle visuel de l’action et le développement de nouvelles méthodologies en psychologie cognitive, en vision par ordinateur ou en neuroimagerie.

Voici un aperçu des projets qui y ont été présentés par le LPVS.

 

Individual differences in face processing ability and consistency in visual strategies
Jessica Royer1, Isabelle Charbonneau1, Gabrielle Dugas1, Valerie Plouffe1, Caroline Blais1, Daniel Fiset1;
1Departement de Psychoeducation et de Psychologie, Universite du Quebec en Outaouais

 

Individual differences in face processing ability are a useful tool to better understand the cognitive and perceptual mechanisms involved in optimal face processing (e.g. see Yovel et al., 2014). We recently showed using the Bubbles technique (Gosselin & Schyns, 2001) that these individual differences are linked to a quantitative increase in the use of the eye area of faces, a feature known to be highly diagnostic for accurate face recognition (Royer et al., VSS 2016 meeting). However, no specific visual strategy was found in the lower recognition ability observers, possibly due to the use of inconsistent visual strategies in these individuals. This inconsistency could manifest at different levels, namely (1) between subjects, i.e. lower ability individuals rely on idiosyncratic recognition strategies, or (2) within subjects, i.e. lower ability individuals show an unstable pattern of diagnostic information throughout the bubbles task. The present experiment directly investigates these propositions. Fifty participants (28 women) were first asked to complete 2000 trials of a 10-alternative forced choice face recognition task in which the stimuli were randomly sampled using Bubbles. All participants also completed three common face matching and recognition tests to quantify their face processing ability. First, between-subject consistency in visual strategies in observers with similar levels of identification performance was strongly correlated with general face processing ability (r = .69; p < .001). Moreover, this inconsistency in visual strategies was also present at the within-subject level. Indeed, face processing ability was also significantly correlated with each observer’s level of consistency in their own visual strategies throughout the bubbles task (r = .42; p = .002). These results demonstrate that while higher ability face recognizers consistently use a similar and stable strategy to recognize faces, lower ability individuals instead rely on idiosyncratic and varying strategies, possibly reflecting the imprecision of their facial representations.

 

Voir le poster 

 

Eye Left the Right Face: The Impact of Central Attentional Resource Modulation on Visual Strategies During Facial Expression Categorization
Justin Duncan1,2,Gabrielle Dugas1, Benoit Brisson3,Caroline Blais1,Daniel Fiset1;
1Université du Québec en Outaouais, 2Université du Québec À Montréal, 3Université du Québec à Trois-Rivières

 

The categorization of facial expressions is impaired when central attentional resources are shared with an overlapping task (Tomasik et al., 2009). Using the psychological refractory period (PRP) dual-task paradigm, we verified if unavailability of central resources precludes the utilization of normal visual strategies. Twenty subjects took part in the study. In the first task (T1), they categorized a sound (150ms) as either low (200Hz or 400Hz) or high (800Hz or 1,600Hz) frequency. In the second task (T2), participants categorized the facial expressions of anger, disgust, fear, happiness, sadness, and surprise taken from the Karolinska face database (Lundqvist, Flykt & Öhman, 1998). External facial cues were hidden with an oval that blended with the background. Faces were sampled with Bubbles (Gosselin & Schyns, 2001) and presented for 150ms. T1 and T2 presentation was separated by a stimulus onset asynchrony (SOA) of either 300ms (central resource overlap) or 1,000ms (no overlap). Participants were instructed to answer as rapidly and as accurately as possible to both tasks, and not to wait for T2 onset before answering to T1. We performed a linear regression of Bubbles’ coordinates on T2 performance. Statistical significance was determined with the Stat4CI toolbox (Chauvin et al., 2005). The categorization of angry, sad, fearful, and surprised expressions strongly correlated with utilization of both eyes and the mouth, at short and long SOAs (Z> 3.4, p< .05). Utilization of the left eye, however, was significantly reduced at short, relative to long SOA (Z> 2, k> 2,347 pixels, p< .05). Interestingly, whereas participants showed a bias favoring the left side of the face at long SOA, they favored the right side at short SOA. Participants always fixated the center of face stimuli. Thus, these results could be hinting at hemispheric differences in sensitivity to the modulation of central attentional resources.

 

Similar visual strategies are used to recognize spontaneous and posed facial expressions
Camille Saumure1, Marie-Pier Plouffe-Demers1,Daniel Fiset1Caroline Blais1;
1Départemen de psychoéducation et psychologie, Université du Québec en Outaouais

Most studies bearing on the visual strategies underlying facial expression recognition have been done using posed expressions (PE). However, evidence suggests that these expressions differ from spontaneous expressions (SE) in terms of appearance, at least in regard of intensity (Ekman & Friesen, 1969), and facial asymmetry (Ross & Pulusu, 2013). In this experiment, the Bubbles method (Gosselin & Schyns, 2001) was used to compare the facial features used to recognize both kinds of expressions. Twenty participants were asked to categorize SE and PE of four basic emotions (disgust, happiness, surprise, sadness). Pictures consisted of 21 identities taken from the MUG database (Aifanti et al., 2010). The amount of facial information needed to reach an accuracy rate of 63% was higher with SE (M=64.0, SD=15.6) than with PE (M=34.4, SD=8.7) [t(19)=-15.07, p< 0.001], indicating that SE were harder to recognize. Classification images of the facial features used by participants to recognize each emotion were generated separately for SE and PE. Statistical thresholds were found with the Stat4CI (Chauvin et al, 2005; Zcrit=3.0; p< 0.025). Similar features were used for the recognition of SE and PE of disgust, happiness and surprise, although the Z scores reached significantly higher values with PE. With the expression of sadness, the information contained in the eye region was only useful for PE. An ideal observer analysis confirmed that the most diagnostic features in the recognition of happiness, surprise and disgust are very similar for PE and SE, and that the eye area has a lower diagnosticity in spontaneous sadness. These results suggest that the facial features utilization underlying the recognition of SE and PE is very similar for most basic expressions, although some qualitative differences are observed for the expression of sadness.

Voir le poster 

 

Visual representation of age groups as a function of ageism levels
Valerie Plouffe1, Youna Dion-Marcoux1,Daniel Fiset1, Hélène Forget1,Caroline Blais1;
Département de psychoéducation et de psychologie, Université du Québec en Outaouais

Prejudice against the elderly is a growing concern and has shown to report many negative social and individual consequences (European social survey, 2012). Last VSS (Dion-Marcoux et al., 2016), we presented a study showing that ageism modulates the mental representation of a prototypical young and old face: individuals with higher prejudice represented a young face as being older and an old face as being younger than individuals with less prejudice. The present study verified if this finding is subtended by ageism modifying the boundaries used to categorize a person as young or old, or by ageism modifying the representation of facial aging throughout life. Thirty young adults took part in three tasks: An Implicit Association Test, an age categorization task, and a Reverse Correlation task. In the Reverse Correlation task, participants had to decide which of three faces embedded in white noise was most prototypical of the appearance of a 20, 40, 60 or 80 years-old face (block design). The mental representations of the ten participants with the highest vs. lowest ageism were averaged, and presented to 30 individuals who estimated their age. Results show a significant interaction between ageism and face group on the perceived age [F(3, 87)=17.17, p< 0.05]. Although participants with higher prejudice had a significantly older perception of the age 40 [t(58)=3.077, p=0.0032], the pattern reversed for 80 years-old faces [t(58)=-2.317, p=0.024], which they represented as younger. The boundary used in the age categorization task did not differ as a function of ageism [t(18)=0.18, ns]. These results suggest that highly prejudiced individuals represent different groups (40, 60 and 80 years-old) of other-age faces as being less dissociable from one another than lower prejudice individuals.

Voir le Poster

 

Morphing Angelina into Jessica reveals identity specific spatial frequency tuning for faces
Gabrielle Dugas1,2,Isabelle Charbonneau1,2,Jessica Royer1,2,Caroline Blais1,2, Benoit Brisson 3,Daniel Fiset1,2;
1Université du Québec en Outaouais, 2Centre de Recherche en Neuropsychologie et Cognition, 3Université du Québec à Trois-Rivières

Many studies have investigated the role of spatial frequencies (SF) in face processing. However, the majority have used tasks where it is difficult to dissociate the impact of physical and identity-specific information. To investigate this question, we first asked 20 participants to classify stimuli taken from 40 morph continua between pairs of famous actors. Sixteen continua reached our categorical perception criteria, i.e. the stimulus at ⅓ along the morph continuum was reliably identified as the first identity whereas the stimulus at ⅔ was reliably identified as the second identity. In the second part of the study, seven participants performed a match-to-sample task where the response stimuli (1248 trials per condition) were sampled with SF Bubbles (Willenbockel et al., 2010). On each trial, the participants saw a target (either the ⅔-⅓ or the ⅓-⅔ of a given continuum) and two response alternatives, both sampled with the same Bubbles. One response choice was visually identical to the sample (i.e. the correct response) whereas the other was taken either from the same perceived identity (e.g. 1-0 for the ⅔-⅓; within-identity trial [WIT]) or from different identities (e.g. ⅓-⅔ for the ⅔-⅓; between-identity trial [BIT]). Expectedly, WIT trials were more difficult than BIT trials for all participants. Multiple regression analyses on  the sampled SFs and the participants’ reaction times (using a median split) were used to create classification images for WIT and BIT trials separately. Comparing diagnostic SFs for these two conditions reveals identity-specific SF tuning for faces. This comparison reveals a spatial frequency band between 4.9 and 8.1 cpf (Zcrit=3.45, p< 0.025; peaking at 5.6 cpf) that is specifically dedicated for identifying known faces. These data offer interesting insight about the visual granularity at which identity is represented in memory.

Voir le Poster

 

Spatial frequency utilization during the recognition of static, dynamic and dynamic random facial expressions.
Marie-Pier Plouffe Demers1, Camille Saumure Régimbald1, Daniel Fiset1,Caroline Blais1;
1Département de Psychoéducation et Psychologie, Université du Québec en Outaouais

Previous studies have revealed that dynamic facial expressions (DFE) are better recognized than static facial expressions (SFE; Ambadar et al., 2005). We have recently demonstrated that DFE can be recognized while fixating less on the features, and relying more on lower spatial frequencies (SF), than with SFE (Saumure et al., VSS2016). Since biological motion can be processed in extrafoveal vision (Gurnsey et al., 2008), the information provided by the motion in DFE may decrease the need to fixate the features and extract higher SF. This hypothesis would predict for dynamic-random facial expressions (D-RFE) created by altering the biological motion of the original DFE (i.e randomized frames) to be processed similarly to SFE. In this experiment, SF utilization of 27 participants was measured with SFE, DFE and D-RFE using SF Bubbles (Willenbockel et al., 2010). Participants categorized pictures and videos (block design) of the six basic facial expressions and neutrality, presented for a duration of 450 ms. SF tunings were obtained by conducting a multiple regression analysis on the SF filters and accuracies across trials. Statistical thresholds were found with the Stat4Ci (Chauvin et al., 2005). SF bands peaking at 16.6 cycles per face (cpf), 14 cpf, and 15.6 cpf were found with SFE, DFE and D-RFE, respectively (ZCrit=2.84  p< 0.05). Low SFs (3.2 to 4.2 cpf) were significantly more utilized with D-RFE than with SFE; and mid-to-high SFs (>18.6; 18.9 to 36.8 cpf) were significantly more utilized with SFE than with D-RFE and DFE respectively (ZCrit=3.09, p< 0.025). A marginal trend also indicated a higher utilization of low SF with DFE than with SFE (Zdynamic-static=2.57). These results suggest reliance on lower SF even when biological motion was altered.

Voir le poster

Spatial frequencies for rapid and accurate race categorisation in Caucasian participants
Isabelle Charbonneau1 ,Gabrielle Dugas1,Jessica Royer1,Caroline Blais1, Benoit Brisson2,Daniel Fiset1;
1Université du Québec en Outaouais, 2Université du Québec à Trois-Rivières

Race categorisation is faster for other race (OR) than same race (SR) faces (Caldara et al., 2004). Some researchers propose that face identification prevails for SR (but not for OR faces), thus decreasing race categorisation proficiency for their own-race (Hugenberg et al., 2010). To gain a better understanding of this phenomenon, we investigated the perceptual basis of race categorisation. Sixteen Caucasians were asked to categorize rapidly and correctly the race of 50 Caucasian and 50 Afro-american faces (400 trials  per race). On each trial, the spatial frequencies (SF) of the stimuli were randomly sampled using SF Bubbles (Willenbockel et al., 2010). Small amounts of white noise were added to each stimulus to keep accuracy at ~90%. Multiple regression analyses were conducted on the sampled SFs and the participant’s speed (using a median split) to create group SF classification images (CI) for Caucasian and Afro-american faces separately. SFs between 1.7 and 9.3 cycles per face (cpf; peaking at 3.4 cpf; peaks were calculated using a 50% area spatial frequency measure) were significantly correlated with response speed for Caucasian faces, whereas SFs between 4.3 and 23.7 cpf (peaking at 10.3 cpf) were significantly correlated with response speed for Afro-american faces. Subtracting one CI from the other showed that rapid categorisation with Caucasian faces was significantly more correlated with the availability of low SF (< 3.3 cpf); Zcrit=3.45, p< 0.025) whereas medium/high SF availability lead to fast categorisation with afro-american faces (between 8.3 and 34.7 cpf); Zcrit=3.45, p< 0.025). These results demonstrate that participants categorized SR faces rapidly if the SFs important for face identification (i.e. medium SFs) were removed from the stimulus, whereas rapid OR face categorization can be based on medium SFs.

Voir le poster 

Impact of myopia on visual attention and the potential link with cultural differences in visual perception
Caroline Blais1, Hana Furumoto-Deshaies1, Marie-Pier Plouffe-Demers1Amanda Estéphan1,Daniel Fiset1;
1Psychoéducation & Psychologie, Université du Québec en Outaouais

Easterners and Westerners have been shown to differ in many visual perceptual tasks, and evidence supports a broader allocation of attention among Easterners than Westerners. For instance, Easterners have a larger global advantage than Westerners in a Navon Task (McKone et al., 2010); they fixate less the eyes and mouth, and more the centre of the face during its processing (Blais et al., 2008); they also tend to process faces in lower spatial frequencies (Tardif et al., in press). Although it has been proposed that perceptual differences emerge from the cultural values (individualistic vs. collectivistic) assumed by each culture (Nisbett et al., 2001), a recent study didn’t succeed at finding links between those cultural values and the eye fixation pattern during face processing (Ramon et al., VSS2016). In this study we explored another lower-level hypothesis that could explain the perceptual differences observed between Easterners and Westerners: the impact of myopia on visual attention. Recent evidence suggests that myopes are less affected by crowding in peripheral vision (Caroll et al., VSS2016). Since myopia prevalence is higher among Chinese compared to Caucasians individuals (Lam et al., 2012), this could potentially explain the visual perception differences observed between Easterners and Westerners. The ability to detect global versus local target letters was measured with myopes (N=12) and emmetropes (N=17) using Navon’s paradigm. No global/local bias differences were found between the groups [t(28)=1.08, p=0.29]. These results do not support the hypothesis that the difference in the prevalence of myopia between both groups underlies the higher global advantage observed in Easterners. More studies will allow us to verify if myopia can explain the cultural differences observed in fixation patterns and spatial frequency utilization during face perception.

Voir poster 

 

2017 Scholarships

Bravo à Gabrielle Dugas qui s’est distinguée aux concours de bourses des grands organismes subventionnaires. Elle se voit récipiendaire pour la Bourse de maitrise en recherche (B1) des Fonds de recherche Nature et Technologies  (FRQNT) ainsi que la Bourse du Conseil de Recherche en Sciences Naturelles et en Génie  CRSNGBESC Maitrise .

Cet été le laboratoire accueillera aussi plusieurs autres boursiers du premier cycle Dominic Mongrain,Gabrielle DugasMarie-Pier Plouffe-Demers, Isabelle CharbonneauMichael N’GuiambaValérie Plouffe , Hana Furumoto et Guillaume Lalonde-Beaudoin dans le cadre du programme de Bourses de recherche de premier cycle octroyées pas le Conseil de Recherche en Sciences Naturelles et en Génie (CRSNG).

Nous tenons aussi à féliciter Joël Guérette, Isabelle CharbonneauGabrielle Dugas et Marie-Pier Plouffe-Demers, pour l’obtention de la Bourse d’excellence du premier cycle de la fondation UQO ainsi que Camille Saumure et Youna Dion-Marcoux pour la Bourse d’excellence du deuxième cycle de la fondation UQO.

Encore une fois felicitations. Nous vous souhaitons à tous un été riche en expériences et apprentissages!