Browsing by Author "Cigdemoglu, C."
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Article Citation Count: 23Argumentation to foster pre-service science teachers' knowledge, competency, and attitude on the domains of chemical literacy of acids and bases(Royal Soc Chemistry, 2017) Çiğdemoğlu, Ceyhan; Arslan, H. O.; Cam, A.; Public Relations and AdvertisingArgumentative practices have the potential to contribute to scientific literacy. However, these practices are not widely incorporated in science classrooms and so their effect on the domains of literacy is still not revealed. Therefore, this study proposes to reveal the effect of argumentation on the three domains of chemical literacy related to the concepts of acids and bases. The study participants comprised 29 freshman pre-service science teachers' enrolled in a General Chemistry-II course. Argumentation practices were implemented over six weeks. Open-ended contextual chemical literacy items were developed to assess the differences in the chemical literacy domains and the items were administered before and right after the intervention. The responses to the chemical literacy items were scored with a rubric and three scores were calculated: knowledge, competency, and attitudes. Paired sample t-tests were used to compare the mean scores. All the intervention sessions were video recorded, and three of them were analyzed according to three criteria: the presence of arguments, the frequency of arguments, and the levels of the arguments. The findings revealed that the argumentation practices contributed to the pre-service teachers' chemical literacy skills, mostly to their knowledge and competencies when compared to their attitudes. Moreover, distinct differences in the quality of argumentation levels were observed over the six weeks.Article Citation Count: 16The effect of peer-led team learning on undergraduate engineering students' conceptual understanding, state anxiety, and social anxiety(Royal Soc Chemistry, 2018) Çiğdemoğlu, Ceyhan; Cigdemoglu, C.; Geban, O.; Public Relations and AdvertisingThis study aims to compare the effectiveness of a Peer-Led Team Learning (PLTL) model with that of traditional college instruction (TCI) in enhancing the conceptual understanding and reducing both the state anxiety and social anxiety of undergraduate engineering students in a general chemistry course in a quasi-experimental design. 128 engineering students taking the course participated in the study. One of the course sections was randomly assigned to the experimental group and the other section was assigned to the control group. Both sections were taught by the same instructor. The control group was instructed using traditional college instruction, while the experimental group was instructed using the PLTL model. Throughout this study, six peer-led chemistry workshops and leader training sessions were performed simultaneously. The General Chemistry Concept Test, the State-Trait Anxiety Inventory, and the Social Anxiety Questionnaire for Adults were administered before and after the treatment to both groups. One-way Multivariate Analysis of Covariance (MANCOVA) indicated that after controlling students' university entrance scores, trait anxiety scores and pre-test scores of both the General Chemistry Concept Test and state anxiety, the PLTL model was more effective in improving the conceptual understanding and reducing the situational anxiety of engineering students in undergraduate general chemistry. However, it was not so effective in lessening their social anxiety when compared to traditional college instruction.