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Professeur titulaire, Faculté des sciences sociales, Sciences sociales-École de psychologie, Université Laval
Chercheur, CERVO
Axe de recherche:
Neurosciences cliniques et cognitives
Intérêts de recherche
Monsieur Grondin commence sa carrière à l’Université Laurentienne où il travaille pendant huit ans avant de se joindre, en 1996, au personnel enseignant de l’École de psychologie. Ses travaux de recherche portent principalement sur le temps psychologique. Il a été rédacteur en chef de la Revue canadienne de psychologie expérimentale (2006–2009) et rédacteur adjoint de la revue Attention, Perception and Psychophysics (2006-2015) et de Psychologie canadienne (2003-2006). En 2016, la Société Québécoise pour la Recherche en Psychologie lui remet le Prix Adrien-Pinard pour souligner sa contribution remarquable à la recherche en psychologie.
Pier-Alexandre Rioux; Daniel Fortin-Guichard; Émilie Cloutier-Debaque; Simon Grondin
Ontogeny of rhythmic performances and contribution of motor and perceptual rhythmic preferences Article de journal
Dans: J Exp Child Psychol, vol. 266, p. 106483, 2026, ISSN: 1096-0457.
@article{pmid41702264,
title = {Ontogeny of rhythmic performances and contribution of motor and perceptual rhythmic preferences},
author = {Pier-Alexandre Rioux and Daniel Fortin-Guichard and Émilie Cloutier-Debaque and Simon Grondin},
doi = {10.1016/j.jecp.2026.106483},
issn = {1096-0457},
year = {2026},
date = {2026-06-01},
journal = {J Exp Child Psychol},
volume = {266},
pages = {106483},
abstract = {According to the entrainment region hypothesis, the range of tempi with which individuals can synchronize broadens during childhood. This developmental change is accompanied by a slowing of rhythmic preferences, as covered by the preferred period hypothesis. The later hypothesis posits that both motor and perceptual rhythmic preferences slow down throughout childhood, reflecting an increase in the common period of endogenous oscillations. This study aimed to further investigate the development of an entrainment region through rhythmic production (counting) and perception (tempo discrimination), while assessing the related contributions of a preferred period (spontaneous motor tempo and perceptual preferred tempo) between childhood and young adulthood. The study (N = 70) included three groups of children (5-6, 8-9, and 11-12 years) and one group of young adults (21-30 years). The results show a change in rhythmic performances around 11-12-year-olds, depending on the task employed. Moreover, results indicate a significant effect of rhythmic context in tempo discrimination, suggesting that young children are sometimes better at discriminating tempo slower than their motor and perceptual rhythmic preferences. For both rhythmic production and perception, spontaneous motor tempo emerges as the strongest contributor to the models, reinforcing its validity as an index of the biological constraints associated with endogenous oscillation. In contrast, the opposite direction of age across models suggests distinct developmental trajectories for rhythmic production and perception, highlighting the influence of additional constraints beyond endogenous oscillation (e.g., cognitive).},
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Antoine Demers; Simon Grondin
Equisection of short empty time intervals marked by successive stimuli of different lengths Article de journal
Dans: Atten Percept Psychophys, vol. 88, no 3, 2026, ISSN: 1943-393X.
@article{pmid41731157,
title = {Equisection of short empty time intervals marked by successive stimuli of different lengths},
author = {Antoine Demers and Simon Grondin},
doi = {10.3758/s13414-025-03218-z},
issn = {1943-393X},
year = {2026},
date = {2026-02-01},
journal = {Atten Percept Psychophys},
volume = {88},
number = {3},
abstract = {Several studies have explored how the duration of stimuli delimiting time intervals influences interval judgments and perceived duration. Most focus on nonneighboring intervals and rely on two-alternative forced choice methods, while the method of adjustment and multimodal conditions are rarely used. This study investigated the ability to discriminate two neighboring intervals using an equisection and adjustment method, with variations in the duration of the stimuli marking the intervals, under multimodal conditions. In two experiments, participants adjusted the second of three brief successive signals (10 or 100 ms) marking two empty intervals until they were perceived as equal. In Experiment 1, only the second signal was lengthened to 100 ms. In Experiment 2, the first, third, or both the first and third signals were lengthened. Results from Experiment 1 show that interval judgments are more variable only when the second marker is lengthened within the same modality. Moreover, in intermodal conditions, the interval following the lengthened marker is perceived as longer than the preceding one. Experiment 2 reveals no overall difference in variability across marker-lengthening conditions but consistently shows that the interval following a lengthened marker is perceived as longer, regardless of modality. These findings clarify how stimulus duration and modality influence equisection judgments of short time intervals, shedding light on when and how timing mechanisms operate.},
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Philippe Vignaud; Jerôme Brunelin; Perrine Galia; Simon Grondin; André Morin; Nathalie Prieto; Emmanuel Poulet; William Vallet
Examining the impact of physiological stress on time perception: A systematic review and meta-analysis Article de journal
Dans: Neurosci Biobehav Rev, vol. 178, p. 106382, 2025, ISSN: 1873-7528.
@article{pmid40998286,
title = {Examining the impact of physiological stress on time perception: A systematic review and meta-analysis},
author = {Philippe Vignaud and Jerôme Brunelin and Perrine Galia and Simon Grondin and André Morin and Nathalie Prieto and Emmanuel Poulet and William Vallet},
doi = {10.1016/j.neubiorev.2025.106382},
issn = {1873-7528},
year = {2025},
date = {2025-09-01},
journal = {Neurosci Biobehav Rev},
volume = {178},
pages = {106382},
abstract = {Stress is a ubiquitous experience that can significantly impact various aspects of human cognition and behavior, including time perception. Time perception, which refers to the ability to estimate and experience time intervals, plays a crucial role in everyday functioning and decision-making. However, whether stress affects how individuals perceive time remains unclear in literature. While some studies report that time perception can be underestimated (i.e., larger time production and shorter estimate) under certain stress conditions, others observe the opposite effect, with an overestimation of perceived time (i.e., shorter time production and larger estimate). To clarify the inconsistencies in the literature, we conducted a systematic review and meta-analysis of studies examining the effects of acute stress on time perception. The model, based on 437 participants exposed to stress and 434 control participants, demonstrated a significant effect favoring overestimated time under stress conditions (Cohen's d = -0.40; 95 % CI: -0.7037 to -0.1016). No significant effects of task type and socio-demographic factors were observed.},
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Charles-Anthony Dubeau; Nicola Thibault; Simon Grondin
A Cross-Sectional Study of the Development of Lateral Preference in Ice Hockey Article de journal
Dans: Res Q Exerc Sport, p. 1–11, 2025, ISSN: 2168-3824.
@article{pmid40758776,
title = {A Cross-Sectional Study of the Development of Lateral Preference in Ice Hockey},
author = {Charles-Anthony Dubeau and Nicola Thibault and Simon Grondin},
doi = {10.1080/02701367.2025.2526638},
issn = {2168-3824},
year = {2025},
date = {2025-08-01},
journal = {Res Q Exerc Sport},
pages = {1--11},
abstract = {In ice hockey, players choose between one of only two ways to hold a stick, which reflects what is referred to as one's lateral preference in ice hockey. What determines this preference remains unknown. While handedness appears to be an important determinant of ice hockey's lateral preference, proportions demonstrate it cannot be the only influencing factor. The aim of the study was (1) to identify when ice hockey's lateral preference is determined in one's development and (2) empirically identify some of its determinant. The sample consisted of 106 children aged three to six, who were asked to perform a stick-handling task. The goal was to test whether their instinctive lateral preference aligned with their optimal lateral preference (i.e. the one in which they performed best), and whether this alignment was more frequent in older children. Neither chi-square nor segmented regression analyses revealed such alignment. Still, the present results suggest that ice hockey's lateral preference is likely determined around 5 years old. Also, parents were asked to answer a home-made questionnaire, which aimed to identify the potential determinant of their children's lateral preference in ice hockey. Parents identified "children's own choice" and parental observation as the main determinants. These two factors thus join handedness (which received further support in the present study) as potential determinants of ice hockey's lateral preference.},
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Antoine Demers; Simon Grondin
Studying the Processing of Multimodal Brief Temporal Intervals with an Equisection (Bisection) Task Article de journal
Dans: Multisens Res, vol. 38, no 1-3, p. 77–122, 2025, ISSN: 2213-4808.
@article{pmid40432614,
title = {Studying the Processing of Multimodal Brief Temporal Intervals with an Equisection (Bisection) Task},
author = {Antoine Demers and Simon Grondin},
doi = {10.1163/22134808-bja10148},
issn = {2213-4808},
year = {2025},
date = {2025-05-01},
journal = {Multisens Res},
volume = {38},
number = {1-3},
pages = {77--122},
abstract = {Several studies have investigated the influence of auditory and visual sensory modalities on the variability and perceived duration of brief time intervals. However, few studies have investigated this influence when the two intervals to be discriminated share the same stimulus, and none of these have included the tactile modality. The aim of the present study was to investigate, in multimodal conditions, the capability to discriminate two adjacent intervals, using an equisection and adjustment method. Participants had to adjust the second of three brief successive signals marking two empty intervals until they were subjectively perceived as equal. The experiment included nine modality conditions and intervals between Markers 1 and 3 lasted 0.5, 1, 1.5, or 2 s (four standard conditions). The results show that the adjustment is better (lower variability) with three auditory (A) than with three visual (V) or tactile (T) markers, and these three conditions are better than when Marker 2 differs from Markers 1 and 3 (all intermodal conditions). Differences also emerged in the perceived duration of intermodal conditions. In TVT and VTV conditions, intervals marked by a tactile-visual (TV) sequence are perceived as longer than VT intervals, and in AVA and VAV conditions AV intervals are perceived as longer than VA intervals. Finally, AT intervals are perceived as longer than TA intervals, but only in the short standard conditions. In addition to replicating the classical variability increase when short intermodal intervals are used, the study shows the influence on perceived duration of the speed of processing of a visual signal.},
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Pier-Alexandre Rioux; William-Girard Journault; Christophe Grenier; Eudes Saiba Ndola; Antoine Demers; Simon Grondin
Discrimination of time intervals in musicians and non-musicians: A multimodal approach Article de journal
Dans: Atten Percept Psychophys, vol. 87, no 3, p. 1033–1041, 2025, ISSN: 1943-393X.
@article{pmid40119030,
title = {Discrimination of time intervals in musicians and non-musicians: A multimodal approach},
author = {Pier-Alexandre Rioux and William-Girard Journault and Christophe Grenier and Eudes Saiba Ndola and Antoine Demers and Simon Grondin},
doi = {10.3758/s13414-025-03054-1},
issn = {1943-393X},
year = {2025},
date = {2025-04-01},
journal = {Atten Percept Psychophys},
volume = {87},
number = {3},
pages = {1033--1041},
abstract = {Musical expertise is acknowledged to lead to better performance in temporal discrimination. However, the ability to discriminate time intervals vary according to the modality that delimits the time interval, as well as the duration of the interval itself. In this study, we investigated the effect of musical training (16 musicians and 16 non-musicians) on the discrimination of empty time intervals with the combination of three types of sensory signals: auditory (A), visual (V), and tactile (T). Three intramodal conditions (AA, VV, TT) and six intermodal conditions (AT, AV, VA, VT, TA, VT) were used. All conditions were tested for two different durations, around 250 ms (sub-second range) and 1,250 ms (supra-second range). Overall, results indicate that the superiority of musicians over non-musicians is not limited to the AA condition, but extends to the VV, TT, and intermodal conditions, and this finding applies to both duration ranges. Also, performance levels were much more homogenous between the two range durations for musicians. Our findings support the idea that musical expertise acts on one general internal timing mechanism and highlight the different temporal discrimination levels associated with the use of different marker-type and duration-range conditions. Data for this experiment are available upon publication ( https://osf.io/8rxmp ).},
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Daniel Fortin-Guichard; Kathryn Johnston; Thomas Romeas; Magdalena Wojtowicz; Jean Lemoyne; David L Mann; Simon Grondin; Joseph Baker
Beyond the trained eye: An objective method to predict game sense in team sports Article de journal
Dans: J Sports Sci, p. 1–17, 2025, ISSN: 1466-447X.
@article{pmid40247614,
title = {Beyond the trained eye: An objective method to predict game sense in team sports},
author = {Daniel Fortin-Guichard and Kathryn Johnston and Thomas Romeas and Magdalena Wojtowicz and Jean Lemoyne and David L Mann and Simon Grondin and Joseph Baker},
doi = {10.1080/02640414.2025.2491976},
issn = {1466-447X},
year = {2025},
date = {2025-04-01},
journal = {J Sports Sci},
pages = {1--17},
abstract = {Talent identification in sports requires a prediction of how athletes will perform in the future based on a sample of their behaviors. Perceptual cognitive-skills or 'game sense' in sports jargon is important for performance, yet sport organizations lack objective and validated measures to predict it. This study aimed to establish the degree to which subjective evaluations of athletes' in-match perceptual-cognitive skills could be predicted by their performance on objective perceptual-cognitive tests. The perceptual-cognitive skills of 40 highly-trained ice-hockey players were assessed by their coaches and the results were compared with the athletes' performance on four laboratory perceptual-cognitive tasks (neuropsychological battery, multiple-object tracking, temporal occlusion, virtual reality). Athletes were also assessed by scouts throughout a hockey season and during small-sided games. Scout judgments best predicted coach rankings, with measures from small-sided games, neuropsychological battery, virtual reality and temporal occlusion improving prediction. Results suggest that adding perceptual-cognitive testing could help scouts better measure athletes during talent identification.},
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Marc-André Dubois; Charles-Antoine Pelletier; Valérie Jomphe; Richard E Bélanger; Simon Grondin; Marc Hébert
Validating skin electrodes: Paving the way for non-invasive ERG use in psychiatry Article de journal
Dans: Prog Neuropsychopharmacol Biol Psychiatry, vol. 137, p. 111305, 2025, ISSN: 1878-4216.
@article{pmid40023309,
title = {Validating skin electrodes: Paving the way for non-invasive ERG use in psychiatry},
author = {Marc-André Dubois and Charles-Antoine Pelletier and Valérie Jomphe and Richard E Bélanger and Simon Grondin and Marc Hébert},
doi = {10.1016/j.pnpbp.2025.111305},
issn = {1878-4216},
year = {2025},
date = {2025-03-01},
journal = {Prog Neuropsychopharmacol Biol Psychiatry},
volume = {137},
pages = {111305},
abstract = {BACKGROUND: Electroretinography (ERG) shows promise for identifying psychiatric biomarkers. The gold-standard approach relies on Dawson-Trick-Litzkow (DTL) electrodes and desktop equipment, but high costs and the expertise required for reliable electrode placement limit its implementation. This study evaluates a cost-effective alternative: a handheld ERG device paired with less invasive self-adhesive skin electrodes, which require minimal training.nnMETHODS: ERG responses to cone and rod luminance stimuli were recorded from 49 participants: 15 controls (8 women, 7 men), 18 with bipolar disorder (12 women, 6 men), and 16 with schizophrenia (4 women, 12 men). Each participant underwent ERG testing with both electrode types.nnRESULTS: Skin electrodes produced significantly smaller amplitudes and shorter latencies than DTL electrodes, except for longer scotopic b-wave latency. Women showed higher amplitudes and shorter latencies than men for both electrode types, with the photopic a-wave amplitude relative difference doubling when using skin electrodes. Reproducibility between eyes was high for both electrode types, though slightly lower for photopic a-wave with skin electrodes (ICC 0.76 vs. 0.86 for DTL).nnCONCLUSION: Skin electrodes paired with handheld ERG devices offer a viable, accessible alternative to traditional DTL electrodes paired with desktop equipment. This approach has the potential to expand the applicability of ERG in clinical settings by addressing barriers like cost, complexity, and invasiveness, while highlighting the need to consider sex differences in ERG assessments, particularly with skin electrodes.},
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Nicola Thibault; Andréanne Sharp; Philippe Albouy; Simon Grondin
Perception of short, but not long, time intervals is modality specific: EEG evidence using vibrotactile stimuli Article de journal
Dans: Cereb Cortex, vol. 35, no 3, 2025, ISSN: 1460-2199.
@article{pmid40056421,
title = {Perception of short, but not long, time intervals is modality specific: EEG evidence using vibrotactile stimuli},
author = {Nicola Thibault and Andréanne Sharp and Philippe Albouy and Simon Grondin},
doi = {10.1093/cercor/bhaf051},
issn = {1460-2199},
year = {2025},
date = {2025-03-01},
journal = {Cereb Cortex},
volume = {35},
number = {3},
abstract = {A longstanding debate in cognitive neuroscience questions whether temporal processing is modality-specific or governed by a "central clock" mechanism. We propose that this debate stems from neglecting the duration of the intervals processed, as studies supporting modality-specific models of time perception often focus on below 1.2-s intervals. To address this, we examined the neuronal dynamics underlying the perception of time intervals shorter and longer than 1.2-s using vibrotactile stimuli. Twenty participants underwent electroencephalogram recordings during a passive tactile oddball paradigm. We compared brain responses to standard and deviant intervals, with deviants occurring either earlier or later than the standard in both below and above 1.2-s conditions. Event-related potentials revealed distinct deviance-related components: a P250 for deviance detection of short deviants and an N400 long deviants. Generators lied in a modality-specific network for short intervals, while long intervals activated a broader, higher-level network. We found no evidence of the contingent negative variation in the tactile modality, questioning its role as a universal marker of temporal accumulation. Our findings suggest that short intervals involve modality-specific circuits, while longer intervals engage distributed networks, shedding light on whether temporal processing is centralized or distributed.},
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Pier-Alexandre Rioux; Simon Grondin
A cross sectional investigation of the development of rhythmic preferences with motor and perceptual tests Article de journal
Dans: Sci Rep, vol. 15, no 1, p. 3479, 2025, ISSN: 2045-2322.
@article{pmid39875512,
title = {A cross sectional investigation of the development of rhythmic preferences with motor and perceptual tests},
author = {Pier-Alexandre Rioux and Simon Grondin},
doi = {10.1038/s41598-025-87631-2},
issn = {2045-2322},
year = {2025},
date = {2025-01-01},
journal = {Sci Rep},
volume = {15},
number = {1},
pages = {3479},
abstract = {The preferred period hypothesis posits a slowing down of motor and perceptual rhythmic preferences with age, both reflecting an increase in the common internal oscillation period. This study further investigates the preferred period hypothesis by improving the measurement of perceptual rhythmic preferences through two tasks, tempo adjustment and tempo judgment, conducted in auditory and visual modalities. The study was conducted with three groups of children (5-6, 8-9, and 11-12 years old), and a group of young adults (21 to 30 years old) during the same time of the day. Correlational analyses show that the relationship between motor and perceptual rhythmic preferences strengthens between childhood and adulthood. Multilevel analyses reveal a general slowing down of motor and perceptual rhythmic preferences, contingent on the task and modality, with distinct trajectories for males and females. Our study indicate that the range of preferred rhythms narrows with age, becoming less variable in young adulthood, at the expense of a single and consistent, default rhythm. In brief, the preferred period appears only in young adults, with no support for the idea of a slowing down of an internal oscillation that would be reflected by both motor and perceptual rhythmic preferences.},
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