Paper Title
Analyzing Students’ Decision-Making Style in Mathematical Critical Thinking Skill based on Mathematical Habits of Mind

The aim of this research is to analyze students’ decision-making style in mathematical habits of mind. This research is conducted a senior high school grade XI students in one of the schools in Medan. It is a case study adopting a qualitative approach by using descriptive analysis. The data are collected using test, observation, and interview. It was found that more than half of students’ mathematical habits of mind is still low. It is also shown that students’ mathematical critical thinking skill is still lacking and most students have behavioral decision-making style. Consequently, students with lower mathematical habits of mind have lower cognitive complexity. Keywords - Mathematical Critical Thinking, Mathematical Habits of Mind, Decision-Making Style.