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De nos jours, différentes ressources littéraires de vulgarisation scientifique (VS), notamment la littérature jeunesse, sont utilisées pour aborder des contenus scientifiques en classe de primaire. Sans tenter de se substituer aux manuels scolaires, ces outils d’éducation non formels proposent différents textes narratifs et informatifs qui présentent des concepts scientifiques. En plus de développer la curiosité scientifique, la littérature jeunesse propose souvent des textes scientifiques d’une grande qualité. Néanmoins, son utilisation n’est pas exempte de difficultés. Notamment, ce type de littérature présente parfois des concepts erronés entraînant le développement de fausses conceptions. Afin d’accompagner les vulgarisateurs scientifiques dans l’élaboration de ressources de VS adaptées aux conceptions alternatives des jeunes lecteurs, et ultimement les amener à remettre en question leurs idées préconçues, nous avons identifié un dispositif didactique conçu essentiellement pour le travail en classe : le texte de réfutation. Pour tenter d’amener un changement conceptuel chez les élèves, ce texte énonce d’abord une conception alternative, puis la réfute, pour ensuite présenter l’explication scientifique du phénomène décrit. Pour donner suite à l’analyse de trois textes de réfutation, nous avons été à même d’identifier certains concepts qui sont au cœur de ce dispositif didactique, notamment la carte conceptuelle, les niveaux de formulation et la transposition didactique. Inspiré par ces concepts, nous avons élaboré un modèle didactique de VS ayant pour but d’accompagner pas à pas un vulgarisateur scientifique dans la conception de ressources adaptées au public de jeunes lecteurs. Le modèle Design Experiment nous a permis de mettre à l’essai et de bonifier cette version provisoire du modèle didactique de VS, grâce à la participation de deux vulgarisateurs scientifiques qui ont chacun élaboré deux textes de vulgarisation scientifique : l’un, des textes narratifs et l’autre, des textes informatifs, pour une cohorte de 83 élèves de cinquième année du primaire. Les sujets abordés dans ces textes sont le requin blanc, le béluga, et les muscles et l’entraînement. Pour que nous puissions étudier l’évolution des conceptions des élèves, chacun d’eux a répondu à un prétest et un posttest, et certains élèves ont également été sollicités pour participer à des entrevues de groupe avec les vulgarisateurs. Cette recherche a permis de réunir la didactique et la VS. Les vulgarisateurs ont pu mesurer la pertinence de prendre en compte les conceptions alternatives des jeunes lecteurs, tirer profit du texte de réfutation et adapter le niveau de formulation de leurs textes. / Nowadays, different literary resources of popular science, including children's literature, are used to address the scientific content in elementary classrooms. Without trying to replace textbooks, these non-formal educational tools offer different narrative and informative texts that present demonstrations of science. In addition to developing scientific curiosity, children's trade books propose scientific texts of high quality. However, these texts would not be without some level of weakness. In particular, they sometimes present erroneous concepts leading to misconceptions. To support the science writers in the popular science resource development suited to alternative conceptions of young learners, and ultimately to get them to change these conceptions, we identified a didactic text designed primarily for classroom work called refutation text. To promote conceptual change, the text first sets out an alternative design, refutes the alternative conception, and then presents scientific explanation. After the analysis of three refutation texts, we were able to identify some didactic concepts at the heart of this text pattern; the concept map, the learner’s knowledge level, and didactic transposition. Inspired by these concepts, we have developed a didactic model of popular science to accompany a science writer, step by step, in the design of appropriate resources for young readers. The Design Experiment model has allowed us to test and improve this experimental model of popular science through the participation of two science writers who each developed two popular science texts. One writer composed two narrative texts, another wrote two informative texts for a group of 83 students in fifth grade. Topics covered in these texts were white sharks, beluga whales, and muscles and training. To study the evolution of student conception, each answered pre-test and post-test questions and some students were also asked to participate in group interviews with the science writers. This research brought together didactics and popular science. Science writers were able to measure the relevance of taking into account the views of young readers’ conceptions, the use of refutation text, and the adaptation of the texts to learner’s knowledge level.

The purpose of this study was to investigate physics undergraduate students’ conceptual change in the concepts of electric potential and energy (EPE) and electromagnetic induction (EMI). Along with this, categorization of students’ conceptions was done based on students’ epistemological and ontological descriptions of these concepts. In addition, the effect of cognitive perturbation using physics interactive simulations (CPS) in relation to cognitive conflict using physics interactive simulations (CCS) was investigated. A pragmatic mixed methods approach was used in a quasi-experimental design. Data were collected by using the modified Diagnostic Exam of Electricity and Magnetism (DEEM), focus group discussions (FGD) and concept maps (CM). Framework analysis was conducted separately on FGD and CM qualitative data to categorize students’ conceptions while concentration analysis was used to categorize students’ responses to the modified DEEM into three levels, during pre and post intervention. In the qualitative results, six categories of alternative conceptions (naive physics, lateral alternative conceptions, ontological alternative conceptions, Ohm’s P-Primes/ P-Primes, mixed conceptions and loose ideas) and two categories of conceptual knowledge (hierarchical and relational) were identified. The alternative conceptions were less frequently and inconsistently revealed within and across the categories. It was concluded that the categories have common characteristics of diversified distribution of alternative conceptions and multiple alternative conceptions of specific concepts within and across the categories. Most of the categories found in pre intervention persisted in post intervention, but with a lesser percentage extensiveness of categories of alternative conceptions in the CPS than in the CCS class and more percentage extensiveness of categories of conceptual knowledge in the CPS than in the CCS class. ANCOVA was separately conducted on the scores of 45 students on the modified DEEM and CM tests to compare the effectiveness of the CCS and CPS. The results showed a significant difference between the two classes of the post test scores on the DEEM test, (1, 36) = 4.66, p=0.04 and similarly, on the CM test, (1, 31) = 8.33, p=0.007. Consequently, it was concluded that there is a statistically significant difference between CPS and CCS in changing students’ alternative conceptions towards scientific conceptions favoring CPS. To characterize and compare students’ conceptual change of both treatment classes, Hake’s average normalized gain <g> from pre to post scores (the modified DEEM and the CM) were analyzed. Finally, it is suggested that in abstract conceptual areas of EM, cognitive perturbation through interactive simulations is more effective than cognitive conflict through interactive simulations in facilitating conceptual change, and, thus, should guide classroom instruction in the area. Furthermore, recommendations are also suggested for guiding future research in this area. / Science and Technology Education / D. Phil. (Mathematics, Science and Technology Education (Physics Education))

The purpose of this study was to investigate physics undergraduate students’ conceptual change in the concepts of electric potential and energy (EPE) and electromagnetic induction (EMI). Along with this, categorization of students’ conceptions was done based on students’ epistemological and ontological descriptions of these concepts. In addition, the effect of cognitive perturbation using physics interactive simulations (CPS) in relation to cognitive conflict using physics interactive simulations (CCS) was investigated. A pragmatic mixed methods approach was used in a quasi-experimental design. Data were collected by using the modified Diagnostic Exam of Electricity and Magnetism (DEEM), focus group discussions (FGD) and concept maps (CM). Framework analysis was conducted separately on FGD and CM qualitative data to categorize students’ conceptions while concentration analysis was used to categorize students’ responses to the modified DEEM into three levels, during pre and post intervention. In the qualitative results, six categories of alternative conceptions (naive physics, lateral alternative conceptions, ontological alternative conceptions, Ohm’s P-Primes/ P-Primes, mixed conceptions and loose ideas) and two categories of conceptual knowledge (hierarchical and relational) were identified. The alternative conceptions were less frequently and inconsistently revealed within and across the categories. It was concluded that the categories have common characteristics of diversified distribution of alternative conceptions and multiple alternative conceptions of specific concepts within and across the categories. Most of the categories found in pre intervention persisted in post intervention, but with a lesser percentage extensiveness of categories of alternative conceptions in the CPS than in the CCS class and more percentage extensiveness of categories of conceptual knowledge in the CPS than in the CCS class. ANCOVA was separately conducted on the scores of 45 students on the modified DEEM and CM tests to compare the effectiveness of the CCS and CPS. The results showed a significant difference between the two classes of the post test scores on the DEEM test, (1, 36) = 4.66, p=0.04 and similarly, on the CM test, (1, 31) = 8.33, p=0.007. Consequently, it was concluded that there is a statistically significant difference between CPS and CCS in changing students’ alternative conceptions towards scientific conceptions favoring CPS. To characterize and compare students’ conceptual change of both treatment classes, Hake’s average normalized gain <g> from pre to post scores (the modified DEEM and the CM) were analyzed. Finally, it is suggested that in abstract conceptual areas of EM, cognitive perturbation through interactive simulations is more effective than cognitive conflict through interactive simulations in facilitating conceptual change, and, thus, should guide classroom instruction in the area. Furthermore, recommendations are also suggested for guiding future research in this area. / Science and Technology Education / D. Phil. (Mathematics, Science and Technology Education (Physics Education))