Mémoire numérisé par la Division de la gestion de documents et des archives de l'Université de Montréal.

Cette thèse a testé un modèle explicatif de santé psychologique au travail, intégrant comme variable bipolaire, l'épuisement professionnel et le bien-être psychologique. Sur la base du Job Demands-Resources Model, des facteurs d'exigences (conflits de rôles et charge de travail) et de ressources organisationnelles (justice organisationnelle, autonomie au travail et soutien social) ont été catégorisés. Le postulat de base de ce modèle a été de prédire des effets directs et indirects des exigences et des ressources sur la santé psychologique par l'intermédiaire de l'assertivité. L'objectif était la validation prévisionnelle et transculturelle du modèle, à travers une modélisation par équations structurelles, auprès de deux échantillons comprenant des enseignants et des infirmiers français et gabonais. L'effectif total de la première vague de données regroupait 273 participants (France : N = 90 enseignants, N = 45 infirmiers ; Gabon : N = 93 enseignants, N = 45 infirmiers) et celui de la deuxième vague s'élevait à 400 participants (France : N = 108 enseignants, N = 96 infirmiers ; Gabon : N = 141 enseignants, N = 55 infirmiers). En France, les résultats démontrent que les exigences au travail agissent directement sur la santé psychologique et que leurs effets sont aussi médiatisés par l'assertivité. Les ressources, pour leur part, influencent directement la santé psychologique. Quant aux résultats du Gabon, les exigences et les ressources organisationnelles prédisent directement la santé psychologique, sans effet médiateur de l'assertivité. De plus, au sein des deux populations, l'assertivité s'est avérée être non seulement une variable salutaire au regard des conditions de travail, mais aussi un fort prédicteur de la santé psychologique au travail. / This thesis tested an explicative model of psychological well-being at work, including as a bipolar variable, burnout and psychological well-being. Based on the Job Demands-Resources Model, jobs demands (role conflict and workload) and job resources (organizational justice and social support) were categorized. The basic assumption of this model was to predict the direct and indirect effects of job demands-resources on psychological health at work through assertiveness. The goal was the previsional and transcultural validation of the model through structural equation modeling, with two samples : teachers and nurses French and Gabonese. The total of the first wave of data consisted of 273 participants (France : N = 90 teachers, N = 45 nurses ; Gabon : N = 93 teachers, N = 45 nurses) and the second wave was 400 partcicipants (France : N = 108 teachers, N = 96 nurses ; Gabon : N = 141 teachers, N = 45 nurses). In France, results demonstrate that the job demands act directly on the psychological health and their effects are also mediated by assertiveness. resources, in turn, directly affect psychological health. As for results of Gabon, job demands-resources directly predict psychological health, unmediated effect of assertiveness. In addition, in both populations, assertiveness is not only a beneficial variable compared to working conditions, but also a strong predictor of psychological health at work.

Mémoire numérisé par la Division de la gestion de documents et des archives de l'Université de Montréal

La relation élève-enseignant (REE) est reconnue comme étant optimale lorsqu’elle est fortement chaleureuse et faiblement conflictuelle. Sur le plan empirique, plusieurs évidences montrent que la qualité de la REE est liée significativement à divers indicateurs de la réussite scolaire. De façon générale, celles-ci affirment que plus un élève entretient une relation optimale avec son enseignant, plus ses résultats scolaires sont élevés, plus il adopte des comportements prosociaux, et plus il présente des affects et des comportements positifs envers l’école. Des études précisent également que l’influence de la qualité de la REE est particulièrement importante chez les élèves à risque. Si les effets positifs d’une REE optimale sont bien connus, les facteurs favorisant son émergence sont quant à eux moins bien compris. En fait, bien que certains attributs personnels de l’élève ou de l’enseignant aient été identifiés comme participant significativement à la qualité de la REE, peu d’études ont investigué l’importance des facteurs psychologiques et contextuels dans l’explication de ce phénomène. Souhaitant pallier cette lacune, la présente étude poursuit trois objectifs qui sont: 1) d’examiner les liens entre les stresseurs, le soutien social, la santé psychologique au travail (SPT) et la qualité de la REE; 2) de vérifier l’effet médiateur de la SPT dans la relation entre les stresseurs, le soutien social et la qualité de la REE, et; 3) d’examiner les différences quant aux liens répertoriés auprès d’élèves réguliers et à risque. Afin d’atteindre ces objectifs, 231 enseignants québécois de niveau préscolaire et primaire ont été investigués. Les résultats des analyses montrent que les comportements perturbateurs des élèves en classe prédisent positivement le conflit entre l’enseignant et les élèves à risque. Ils montrent également que le soutien des parents et le soutien du supérieur prédisent respectivement la présence de REE chaleureuses chez les élèves réguliers et à risque. La SPT de l’enseignant prédit quant à elle positivement la présence de REE chaleureuses et négativement la présence de REE conflictuelles. Les résultats de cette recherche montrent aussi que le soutien social affecte indirectement la présence de REE chaleureuses par le biais de la SPT de l’enseignant. / An optimal student-teacher relationship (STR) is generally recognized as being closer and less conflictual. In the scientific documentation, many studies show that the quality of the STR is significantly associated with several indicators of school performance. More precisely, the results of these investigations demonstrate that the more a student share an optimal relationship with his teacher, the higher are his results at tests and exams, the more he adopts prosocial behaviors, and the more he presents positive affects and behaviors towards school and learning. Many studies also show that the influence of the quality of the STR is more important for students at-risk. However, even if the positive effects of an optimal STR on school performance are known, the knowledge about the factors that facilitate its emergence is still very limited. Although some predictors related to personal attributes of students or teachers have been highlighted, few studies have investigated the importance of psychological and contextual predictors of this phenomena. In an attempt to alleviate this deficiency, this research pursues three objectives that are : 1) to verify the relationship between stressors, social support, psychological health at work (PHW) and the quality of the STR; 2) to examine the moderating effect of PHW in the relationship between stressors, social support and the quality of the STR, and; 3) to verify the differences highlighted in the results for regular and at-risk students. In order to verify these three objectives, 231 teachers from the province of Quebec teaching in kindergarten and elementary school have been studied. The results from the analyses show that the disruptive behaviors of students in class predict positively the conflict between teachers and students at-risk. The results also show that social support from parents is positivelly related to closeness for regular students, whereas social support from the director is positivelly related to closeness for students at-risk. Teacher’s PHW also predicts positively closeness and negatively conflict for both regular and at-risk students. The results of the analyses also demonstrate that social support is indirectly related to closeness for regular and at-risk students, through PHW.

Mémoire numérisé par la Division de la gestion de documents et des archives de l'Université de Montréal

La présente thèse a pour objectif de clarifier la nature de la relation entre les habiletés numériques innées – le Sens du Nombre – et les compétences en arithmétique apprises à l’école. L’originalité de cette recherche consiste en l’attention particulière que je porterai au rôle que jouent les habiletés numériques innées dans les différentes manières de résoudre une addition complexe, telle que 48 + 25, c’est-à-dire les stratégies de résolution. Dans le présent travail, je m’attèlerai à déterminer si la possession de compétences numériques plus développées favorise l’utilisation de procédures de calcul qui tiennent compte des propriétés numériques des opérandes du calcul, et si, inversement, la possession d’habiletés numériques plus imprécises entrave leur application, au profit de stratégies de calcul plus basiques. <p><p>À cette fin, j’axerai la présente thèse en trois volets distincts. Dans un premier volet, je vérifierai que les habiletés numériques sont essentielles à l’implémentation de toutes les stratégies de calcul, malgré le fait qu’elles soient engagées à des degrés d’élaboration différents en fonction de la stratégie exécutée. Ensuite, dans un second volet, je confirmerai que les compétences numériques orientent les préférences stratégiques ;comme je le supposais, les calculateurs possédant les habiletés numériques les plus développées ont davantage recours à des stratégies basées sur la magnitude complète des nombres, alors que ceux qui ont des capacités plus limitées les évitent. Enfin, dans un dernier volet, je mettrai en évidence que l’application de telles stratégies qui impliquent de traiter les numérosités entières engendre au niveau cérébral une activité accrue au sein des régions intrapariétales, aires dédiées au traitement des magnitudes numériques, par rapport aux autres procédures de calcul.<p><p>Les résultats que je rapporte dans la présente thèse mettent ainsi en évidence que les habiletés numériques sont critiques dans la résolution d’additions complexes non seulement au niveau de l’exécution de la stratégie de calcul, mais aussi dans l’établissement à long terme de la préférence stratégique des individus. Outre ces observations, la présente recherche plaide plus généralement en faveur de la prise en considération des stratégies de résolution dans les tâches arithmétiques, car les compétences numériques peuvent y être associées à des degrés différents. Au-delà de la simple performance, s’intéresser plus qualitativement aux stratégies de résolution constitue selon moi une étape cruciale dans la compréhension de la nature du lien entre le Sens du Nombre inné et les compétences en arithmétique.<p><p>/<p><p>The current thesis aims at clarifying the nature of the relationship between innate numerical abilities – the Number Sense – and arithmetic skills acquired at school. I will particularly focus in this research on the role played by these innate numerical abilities in selecting and executing the different procedures that could be used to solve a complex addition such as 48 + 27. In the current thesis, I will attempt to determine whether more elaborated numerical competence favours the utilisation of solving strategies that take into account the numerical properties of the addends, and conversely, whether inaccurate numerical representations discourage from using these strategies, for the benefit of more basic solving strategies.<p><p>In the current thesis, I will more specifically cover three different aspects. First of all, I will demonstrate that numerical abilities are crucial in implementing every solving strategy, but that they are engaged to a different extent as a function of the executed strategy. Secondly, I will show that numerical competence determine strategic preference; as I hypothesized, adults who possess the best numerical abilities would use more frequently solving strategies that are based on the entire numerical magnitude of the addends, whereas adults with more limited abilities would rather avoid them and execute basic procedures. Finally, in the third section, I will emphasize that the use of such elaborated solving strategies do imply at the cerebral level a stronger activity within the intraparietal regions, which are dedicated to the numerical magnitude processing, in comparison to other basic solving strategies.<p><p>The data I report here thus highlight that numerical abilities are essential in solving complex additions, not only in the execution of the solving strategy, but also in the long-term establishment of the preferred strategy. Besides this observation, the current thesis claims more generally in favour of the consideration of solving strategies when assessing arithmetic tasks, because numerical abilities are involved to a distinct extent in these tasks. Over and above regular performance, investigating through a qualitative perspective the solving strategies constitutes, according to me, a fundamental step in understanding the nature of the relationship between the innate Number Sense and arithmetic skills.<p> / Doctorat en Sciences Psychologiques et de l'éducation / info:eu-repo/semantics/nonPublished

Fractions are very hard to learn. As the joke goes, “Three out of two people have trouble with fractions”. Yet the invention of a notation for fractions is very ancient, dating back to Babylonians and Egyptians. Moreover, it is thought that ratio representation is innate. And obviously, fractions are part of our everyday life. We read them in recipes, we need them to estimate distances on maps or rebates in shops. In addition, fractions play a key role in science and mathematics, in probabilities, proportions and algebraic reasoning. Then why is it so hard for pupils to understand and use them? What is so special about fractions? As in other areas of numerical cognition, a fast-developing field in cognitive science, we tackled this paradox through a multi-pronged approach, investigating both adults and children.<p>Based on some recent research questions and intense debates in the literature, a first behavioural study examined the mental representations of the magnitude of fractions in educated adults. Behavioural observations from adults can indeed provide a first clue to explain the paradox raised by fractions. Contrary perhaps to most educated adults’ intuition, finding the value of a given fraction is not an easy operation. Fractions are complex symbols, and there is an on-going debate in the literature about how their magnitude (i.e. value) is processed. In a first study, we asked adult volunteers to decide as quickly as possible whether two fractions represent the same magnitude or not. Equivalent fractions (e.g. 1/4 and 2/8) were identified as representing the same number only about half of the time. In another experiment, adults were also asked to decide which of two fractions was larger. This paradigm offered different results, suggesting that participants relied on both the global magnitude of the fraction and the magnitude of the components. Our results showed that fraction processing depends on experimental conditions. Adults appear to use the global magnitude only in restricted circumstances, mostly with easy and familiar fractions. <p>In another study, we investigated the development of the mental representations of the magnitude of fractions. Previous studies in adults showed that fraction processing can be either based on the magnitude of the numerators and denominators or based on the global magnitude of fractions and the magnitude of their components. The type of processing depends on experimental conditions. In this experiment, 5th, 6th, 7th-graders, and adults were tested with two paradigms. First, they performed a same/different task. Second, they carried out a numerical comparison task in which they had to decide which of two fractions was larger. Results showed that 5th-graders do not rely on the representations of the global magnitude of fractions in the Numerical Comparison task, but those representations develop from grade 6 until grade 7. In the Same/Different task, participants only relied on componential strategies. From grade 6 on, pupils apply the same heuristics as adults in fraction magnitude comparison tasks. Moreover, we have shown that correlations between global distance effect and children’s general fraction achievement were significant.<p>Fractions are well known to represent a stumbling block for primary school children. In a third study, we tried to identify the difficulties encountered by primary school pupils. We observed that most 4th and 5th-graders had only a very limited notion of the meaning of fractions, basically referring to pieces of cakes or pizzas. The fraction as a notation for numbers appeared particularly hard to grasp. <p>Building upon these results, we designed an intervention programme. The intervention “From Pies to Numbers” aimed at improving children’s understanding of fractions as numbers. The intervention was based on various games in which children had to estimate, compare, and combine fractions represented either symbolically or as figures. 20 game sessions distributed over 3 months led to 15-20% improvement in tests assessing children's capacity to estimate and compare fractions; conversely, children in the control group who received traditional lessons improved more in procedural skills such as simplification of fractions and arithmetic operations with fractions. Thus, a short classroom intervention inducing children to play with fractions improved their conceptual understanding. <p>The results are discussed in light of recent research on the mental representation of the magnitude of fractions and educational theories. The importance of multidisciplinary approaches in psychology and education was also discussed. <p>In sum, by combining behavioural experiments in adults and children, and intervention studies, we hoped to have improved the understanding how the brain processes mathematical symbols, while helping teachers get a better grasp of pupils’ difficulties and develop classroom activities that suit the needs of learners.<p> / Doctorat en Sciences Psychologiques et de l'éducation / info:eu-repo/semantics/nonPublished

Doctorat en Sciences Psychologiques et de l'éducation / info:eu-repo/semantics/nonPublished

Doctorat en sciences psychologiques / info:eu-repo/semantics/nonPublished

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