Critical thinking skills are one of the four skills needed in the 21st century. Critical thinking skills are so important that they need to be taught and included in the school curriculum. This research aims to: (1) describe the critical thinking skills of junior high school students in solving mathematical problems and (2) identify the students' critical thinking components in the analysis, evaluation, inference, explanation, and self-regulation sub-skills. This is descriptive research with a qualitative approach. Data was collected through a test and interviews, triangulation accomplished by comparing between test and interviews. This research involved 24 subjects comprising 9 male students and 15 female students. The test used in this research consisted of 6 problems representing 6 sub-skills of critical thinking skills. The results of data collection were analyzed through data reduction, data display, and conclusion drawing. The research results showed that: (1) the critical thinking skills of junior high school students were in a low category; (2) the evaluation, analysis, and self-regulation sub-skills became the lowest critical thinking sub-skills mastered by the students compared to other critical thinking sub-skills.

中文翻译：

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初中数学解题批判性思维能力调查

批判性思维技能是 21 世纪所需的四项技能之一。批判性思维技能非常重要，需要教授并包含在学校课程中。本研究旨在：（1）描述初中生解决数学问题的批判性思维能力；（2）识别学生在分析、评价、推理、解释和自我调节等子技能中的批判性思维成分. 这是采用定性方法的描述性研究。数据是通过测试和访谈收集的，三角测量通过测试和访谈之间的比较来完成。这项研究涉及 24 个科目，包括 9 名男学生和 15 名女学生。本研究中使用的测试包括代表批判性思维技能的 6 个子技能的 6 个问题。通过数据归约、数据展示、得出结论等方式对数据收集结果进行分析。研究结果表明：（1）初中生批判性思维能力处于低水平；(2)评价、分析、自我调节等子技能成为学生掌握的批判性思维子技能相对于其他批判性思维子技能最低的。