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Fabien Mathy

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titre
Investigating interactions between types of order in categorization
auteur
Giulia Mezzadri, Patricia Reynaud-Bouret, Thomas Laloë, Fabien Mathy
article
2021
annee_publi
2021
resume
This study investigates how different types of presentation orders influence category learning and generalization. We used a full factorial design (within-category, between-category, and across-blocks manipulations), each factor having two levels (rule-based vs. similarity-based, blocked vs. interleaved, and constant vs. variable orders, respectively). This research offers a unique and novel approach through both an individual and concurrent analysis of the studied factors. Moreover, the investigation of across-blocks manipulations is unprecedented. Using survival analysis techniques as well as non-parametric tests, we found that learning was impacted by both within-category and across-blocks manipulations (with across-blocks manipulation being the main predictor). More specifically, the rule-based and constant orders were found more beneficial than the similarity-based and variable orders, respectively. Also, within-category and between-category orders were found to affect generalization patterns. More precisely, participants in the rule-based order more often showed generalization patterns consistent with a rule-based strategy than participants in the similarity-based order. Likewise, participants in the interleaved order more often showed generalization patterns consistent with a rule-based strategy than participants in the blocked order. We conclude that combining a similarity-based order with a variable across-blocks manipulation delays learning, whereas combining a rule-based order with a constant across-blocks manipulation benefits learning. Furthermore, combining a rule-based order with an interleaved order favors the use of a rule-based strategy during category generalization.
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https://hal.archives-ouvertes.fr/hal-03349792/file/Investigating%20interactions%20between%20types%20of%20order%20in%20categorization%20_2021.pdf BibTex
titre
Statistical learning of unbalanced exclusive-or temporal sequences in humans
auteur
Laura Lazartigues, Fabien Mathy, Frédéric Lavigne
article
PLoS ONE, Public Library of Science, 2021, 16 (2), pp.e0246826. ⟨10.1371/journal.pone.0246826⟩
annee_publi
2021
resume
A pervasive issue in statistical learning has been to determine the parameters of regularity extraction. Our hypothesis was that the extraction of transitional probabilities can prevail over frequency if the task involves prediction. Participants were exposed to four repeated sequences of three stimuli (XYZ) with each stimulus corresponding to the position of a red dot on a touch screen that participants were required to touch sequentially. The temporal and spatial structure of the positions corresponded to a serial version of the exclusive-or (XOR) that allowed testing of the respective effect of frequency and first- and second-order transitional probabilities. The XOR allowed the first-order transitional probability to vary while being not completely related to frequency and to vary while the second-order transitional probability was fixed (p(Z|X,Y) = 1). The findings show that first-order transitional probability prevails over frequency to predict the second stimulus from the first and that it also influences the prediction of the third item despite the presence of second-order transitional probability that could have offered a certain prediction of the third item. These results are particularly informative in light of statistical learning models.
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Article dans une revue
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titre
Lower verbalizability of visual stimuli modulates differences in estimates of working memory capacity between children with and without developmental language disorders
auteur
Seçkin Arslan, Lucie Broc, Fabien Mathy
article
Autism & Developmental Language Impairments, 2020, 5, pp.239694152094551. ⟨10.1177/2396941520945519⟩
annee_publi
2020
resume
Background and aims: Children with developmental language disorder (DLD) often perform below their typically developing peers on verbal memory tasks. However, the picture is less clear on visual memory tasks. Research has generally shown that visual memory can be facilitated by verbal representations, but few studies have been conducted using visual materials that are not easy to verbalize. Therefore, we attempted to construct non-verbalizable stimuli to investigate the impact of working memory capacity. Method and results: We manipulated verbalizability in visual span tasks and tested whether minimizing verbalizability could help reduce visual recall performance differences across children with and without developmental language disorder. Visuals that could be easily verbalized or not were selected based on a pretest with non-developmental language disorder young adults. We tested groups of children with developmental language disorder (N ¼ 23) and their typically developing peers (N ¼ 65) using these high and low verbalizable classes of visual stimuli. The memory span of the children with developmental language disorder varied across the different stimulus conditions, but critically, although their storage capacity for visual information was virtually unimpaired, the children with developmental language disorder still had difficulty in recalling verbalizable images with simple drawings. Also, recalling complex (galaxy) images with low verbalizability proved difficult in both groups of children. An item-based analysis on correctly recalled items showed that higher levels of verbalizability enhanced visual recall in the typically developing children to a greater extent than the children with developmental language disorder. Conclusions and clinical implication: We suggest that visual short-term memory in typically developing children might be mediated with verbal encoding to a larger extent than in children with developmental language disorder, thus leading to poorer performance on visual capacity tasks. Our findings cast doubts on the idea that short-term storage impairments are limited to the verbal domain, but they also challenge the idea that visual tasks are essentially visual. Therefore, our findings suggest to clinicians working with children experiencing developmental language difficulties that visual memory deficits may not necessarily be due to reduced non-verbal skills but may be due to the high amount of verbal cues in visual stimuli, from which they do not benefit in comparison to their peers.
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Article dans une revue
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https://hal.archives-ouvertes.fr/hal-02929714/file/Arslan-Broc-Mathy-2020.pdf BibTex
titre
Reduced deficits observed in children and adolescents with developmental language disorder using proper nonverbalizable span tasks
auteur
Seçkin Arslan, Lucie Broc, Thierry Olive, Fabien Mathy
article
Research in Developmental Disabilities, Elsevier, 2020, 96, pp.103522. ⟨10.1016/j.ridd.2019.103522⟩
annee_publi
2020
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Article dans une revue
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titre
Working memory complex span tasks and fluid intelligence: Does the positional structure of the task matter?
auteur
Miriam Debraise, Nicolas Gauvrit, Fabien Mathy
article
Psychonomic Bulletin & Review, 2020, pp.1--11
annee_publi
2020
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Article dans une revue
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titre
The development of working memory spatialization revealed by using the cave paradigm in a two-alternative spatial choice.
auteur
Alessandro Guida, Michaël Fartoukh, Fabien Mathy
article
Annals of the New York Academy of Sciences, 2020, 1477 (1), pp.54--70
annee_publi
2020
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Article dans une revue
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titre
Spatialization in working memory: can individuals reverse the cultural direction of their thoughts?
auteur
Alessandro Guida, Francis Mosinski, Krzysztof Cipora, Fabien Mathy, Yvonnick Noël
article
Annals of the New York Academy of Sciences, 2020, 1477 (1), pp.113--125
annee_publi
2020
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Article dans une revue
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titre
Children’s working memory develops at similar rates for sequences differing in compressibility
auteur
Fabien Mathy, Michael Fartoukh, Ori Friedman, Nicolas Gauvrit, Alessandro Guida
article
LAnnee psychologique, 2020, 120 (2), pp.175--202
annee_publi
2020
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Article dans une revue
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titre
Allegedly phonological processes in sequential processing of lexical, grammatical, and phonological information
auteur
Tobias Scheer, Fabien Mathy, Fanny Meunier
article
59th Annual meeting of the Psychonomic Society, Nov 2019, New Orleans, United States
annee_publi
2019
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Communication dans un congrès
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titre
Organization in Working Memory is Driven by the Compressibility of Information
auteur
Laura Lazartigues, Frédéric Lavigne, Carlos Aguilar, Fabien Mathy
article
60th Annual Meeting of the Psychonomic Society, Nov 2019, Montréal, Canada
annee_publi
2019
resume
Working memory (WM) is known to be limited in capacity, but mechanisms based on compression of information could contribute to the storage process. It has been shown that chunking governed by compression could be one of these mechanisms. The present study investigated how chunks can be formed using patterns to be discovered on the spot, that is, without these chunks being already formed in long-term memory. We predicted that a compact representation could leave room in WM at the expense of the quality. Our method was based on a compressibility metric that allowed prediction of memory errors linked to a lossy compression process. Our result showed that RTs and errors depended on compressibility, and those measures might be interpretable in terms of over-compressibility. We discuss the results to conclude that the present study offers a comprehension of WM capacity which cannot be accounted easily by shared-allocation models or discrete-slots models.
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Poster
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