<![CDATA[Scientific problem-solving is a core competency in science education, yet students frequently struggle to apply it effectively. This study aims to analyze junior high school students’ science problem-solving abilities in relation to personality types within an Indonesian context, specifically at SMP Negeri 3 Batanghari. A qualitative case study approach was employed, involving 12 students categorized into four personality types—sanguine, choleric, melancholic, and phlegmatic—based on psychological assessment, interviews, and classroom observations. Data were collected through science problem-solving tasks, classroom observation, and the think-aloud protocol during task completion. Thematic analysis was conducted through data reduction, data display, and drawing conclusions, supported by source and method triangulation to ensure credibility. Findings reveal that personality types significantly influence problem-solving strategies and efficiency. Sanguine students tend to solve problems quickly but with lower accuracy, while melancholic students demonstrate high precision but slower progress. Choleric learners exhibit assertive and goal-oriented approaches, whereas phlegmatic students show consistent yet hesitant performance. The study concludes that differentiating science instruction based on students’ psychological characteristics can enhance the effectiveness of problem-solving skill development. These insights support the need for personalized pedagogical strategies in science classrooms.]]>
