@article{article_1637491, title={Factors Influencing Science Achievement in Turkey in TIMSS 2015 and 2019}, journal={Journal of Education and Future}, pages={213–225}, year={2025}, DOI={10.30786/jef.1637491}, author={Yaşar, Merve Seda and Yilmaz, Ayhan and Ceylan, Eren}, keywords={TIMSS, homework, belonging, expectations, value, confidence}, abstract={This study investigates the factors associated with the level of science competency among eighth-grade students in Turkey in the 2015 and 2019 cycles of the Trends in International Mathematics and Science Study (TIMSS). Using data obtained from TIMSS 2015 and 2019, the study examines relationships between factors such as educational expectations, frequency of science teachers assigning homework, sense of belonging to school, enjoyment of learning science, valuing science, and confidence in science and students’ science competency levels. Data from science achievement tests and student questionnaires collected from eighth-grade students in Turkey who participated in TIMSS 2015 and 2019 evaluations were used as research instruments. The sample comprised 6,079 students included within the scope of TIMSS 2015, and 4,077 students included in TIMSS 2019 at the eighth-grade level. Logistic regression analyses were performed for the obtained data with results demonstrating that factors such as educational expectations and confidence in science had strong positive relationships with the students’ science competency. In contrast, factors including the frequency of science teachers assigning homework, sense of belonging to school, enjoyment of learning science, and valuing science were found to have negative relationships with science competency levels.}, number={28}, publisher={Aydın Yayıncılık}, organization={IEA}