The aim of this study is to examine the self-esteem and decision-making styles of students studying in secondary education institutions. In this study, which is a quantitative research, the survey model was adopted. The population of the study consists of secondary education institutions affiliated to Kütahya Provincial Directorate of National Education, while the sample group includes a total of 442 participants, 250 males and 192 females, who continue their education in these secondary education institutions. As a measurement tool, Melbourne Decision Making Scale I-II which was developed by Mann et al. (1998) and was adapted into Turkish by Deniz (2004) was used. T-test and ANOVA tests were applied to analyse the obtained data. Based on the assumption of homogeneous distribution of the data, Welch values were taken into consideration and Tamhane's T2 test values from Post Hoc tests were analysed. The results showed statistically significant differences according to the participants' gender, sport type, competition participation status and education level variables. Factors such as gender, sport type and competition participation status can affect decision making styles. Therefore, determining the variables affecting self-esteem and decision-making styles is important for students.

Decision-making, secondary education, student, learning, self-esteem.