Validation d'une version française du NADL-F : mesure de l'impact dans l’utilisation financière au quotidien chez des adultes avec des difficultés en mathématiques.
DOI :
https://doi.org/10.61989/6byw4k71Mots-clés :
cognition mathématique, dyscalculie développementale, adulte, NADL-F, test, impact financierRésumé
Contexte : Les compétences en mathématiques sont essentielles, celles-ci étant omniprésentes dans les pays industrialisés. Les difficultés en mathématiques perdurent à l’âge adulte chez les personnes présentant un trouble spécifique des apprentissages en mathématiques, anciennement appelé dyscalculie. Pourtant, peu d’études se sont intéressées à cette population et aucune n’a mesuré l’impact de tels troubles sur les capacités financières au quotidien.
Objectifs : L’objectif était de comparer les capacités de manipulation des concepts financiers et de compréhension des situations d’achats chez des individus avec et sans difficulté en mathématiques.
Méthode : La présente étude inclut 171 volontaires ne présentant pas de trouble neurologique acquis. Ainsi, 63 adultes avec des difficultés en mathématiques et 108 participants sans difficulté mathématique ont été confrontés à des tâches financières issues du test italien NADL-F (Arcara, 2017) traduit et adapté en français (NADL-F-fr) pour la présente étude : compter la monnaie, lire des nombres sur des supports financiers, payer ou rendre la monnaie dans des situations d’achat, calculer des pourcentages, définir des termes financiers, repérer des escroqueries. Les participants ont également donné leur ressenti sur leurs compétences dans ces différents domaines.
Résultats : Les performances des adultes avec des difficultés en mathématiques concordent avec leur perception de leurs difficultés. En effet, ils sont significativement moins performants que le groupe contrôle pour compter la monnaie, lire des nombres sur des documents financiers ou commerciaux, estimer le montant de leurs courses, calculer des pourcentages et définir des concepts financiers.
Conclusion : Les adultes présentant des difficultés mathématiques sont aussi particulièrement en difficulté pour manipuler des concepts mathématiques relatifs à la finance. Le NADL-F-fr sera un outil participant à l’évaluation et à la pose de diagnostic de trouble spécifique des apprentissages en mathématiques pour les adultes n’ayant pu être diagnostiqués pendant l’enfance. De plus, de tels résultats montrent l’importance de travailler, en rééducation, sur des situations financières écologiques.
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(c) Copyright Marion Lavest, Jessica Bourgin, Anne Lafay 2025
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