Effects of student-based factors in TIMSS 2019 cycle on mathematics and science achievement

The aim of this research is to examine the student-based factors that affect the mathematics and science achievement of Turkish students participating in the TIMSS 2019 (Trends in International Mathematics and Science Study), one of the International Large-Scale Assessments. The universe of the research consists of all students participating in the TIMSS 2019 cycle at the 8th grade level from 39 different countries, while the sample of the study consists of 4,077 students from 181 schools at the 8th grade level. In the TIMSS 2019 cycle in Turkey, stratification was made by determining the geographical region, the structure of schools and urbanization criteria. Schools are determined by considering these determined strata. After determining the schools, a class was selected from each selected school. In the TIMSS 2019 cycle, besides the achievement tests to determine the performance of the students, the questionnaires used to determine the student characteristics were also used. In the TIMSS 2019 cycle, in determining the success of the students in the relevant field, achievement tests; information on other variables affecting success was also obtained from the student questionnaire. The data obtained from these surveys constitute the data of this study. Correlational research model was used in this study. According to the result of the correlation analysis applied between the cause and effect relationship between success and the factors affecting TIMSS student success, it is seen that students' attitudes towards the mathematics lesson, their participation in this lesson, their appreciation of this lesson and their self-confidence in mathematics positively affect their mathematics achievement. Likewise, when the results of the analysis are examined, it is seen that the attitude towards science lesson, participation in science lesson, valuing science lesson and self-confidence in science lesson have positive effects on science achievement.