Browsing by Author "Karakoyun, Gulen Onal"

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Analysis of End-Of Questions in General Chemistry Textbooks Prepared Specifically for the Science Education Curriculum Using the Eq-P Framework: An Integrated Study With Bloom's Taxonomy
(Amer Chemical Society, 2025) Karakoyun, Gulen Onal
This research has two primary objectives: 1) to examine the distribution and representation of chemical reasoning in end-of-chapter assessment questions in General Chemistry textbooks specifically designed for the Turkish Science Education curriculum using the Essential Questions-Perspectives (EQ-P) framework; 2) to analyze chemistry questions by combining the EQ-P framework and the Bloom taxonomy. The combined use of these two methods allowed for the simultaneous analysis of the essential disciplinary questions and perspectives of the EQ-P framework and the cognitive process and knowledge dimensions of the Bloom taxonomy. This combination also provided significant advantages and convenience in revealing the relationship between the elements of the EQ-P framework and the Bloom taxonomy. It was determined that, among end-of-chapter questions in General Chemistry textbooks, chemistry questions related to the essential question of explanation and prediction (E&P) ranked first, followed by chemistry questions related to the essential questions of description and identification (D&I) and transformation and synthesis (T&S), ranked second and third, respectively. This indicates that chemistry questions that assess students' ability to establish cause-effect relationships, make predictions, and explain chemical phenomena are given more emphasis than other questions. Among the 12 perspectives, the most frequently encountered perspectives in chemistry questions were thermodynamics, interaction, and structure, respectively. Analysis using the EQ-P and Bloom taxonomy combined revealed that questions related to the D&I category largely focused on the cognitive process dimensions of the Bloom taxonomy: understanding and application.
The Role of Heuristics in the Reasoning Process of Pre-Service Science Teachers on the "chemical Structure - Acidity/Basicity Relationship" Topic
(Slovensko Kemijsko Drustvo, 2021) Karakoyun, Gulen Onal; Asilturk, Erol
The purpose of this research is to examine the effects of 10 heuristics proposed by Talanquer on the reasoning processes of science teacher candidates on the "chemical structure - acidity-basicity relationship" topic. In this phenomenographic research, interviews were conducted with 30 prospective teachers enrolled in the Science Education Program, Education Faculty, Firat University in the spring semester of the 2018-2019 academic year. In the first stage of the two-stage interview, the participants were asked to rank some chemical compounds according to their increasing acidity strength, while in the second stage, they were asked to rank some chemical compounds according to their increasing basicity strength. In the interviews, participants were also asked to explain in detail the reasons for their ranking. From the answers given by the participants to the questions, six different answer patterns were obtained for acidity strength, while five different answer patterns were obtained for basicity strength. It was determined that all ten heuristics affect the reasoning of the participants, and because of the effects of heuristics, students generally use shortcut strategies instead of scientific reasoning. In addition, this study revealed that although it was not included in the model proposed by Talanquer, periodic trends heuristic also affected the reasoning of the participants on the "chemical structure - acidity/basicity relationship".
The Effect of Heuristics on the Reasoning of the Pre-Service Science Teachers on the Topic of Melting and Boiling Point
(Slovensko Kemijsko Drustvo, 2022) Karakoyun, Gulen Onal; Asilturk, Erol
The purpose of this study was to explore the effects of the heuristics on the reasoning processes of pre-service science teachers on the topic of melting and boiling point using the ten heuristic model proposed by Talanquer. In this phenomenographic study carried out in the spring semester of the 2018-2019 academic year, interviews were conducted with 30 teacher candidates enrolled in the Science Teaching Program of Firat University Faculty of Education. Participants were asked to answer three different questions during the interviews. These questions were about the ranking of some compounds according to their melting or boiling points. Six different answer patterns for each question were obtained from the answers. The findings of this study showed that students generally used shortcut strategies instead of analytical/ scientific reasoning, as all ten heuristics affected participants' reasoning. This study also revealed that although not included in the model proposed by Talanquer, periodic trends heuristic also influenced participants' reasoning about the melting and boiling point.