The Effectiveness of Problem Based Learning Model to Improve Conceptual Understanding and Intrapersonal Skill

This study aimed to determine the effectiveness of problem based learning model to improve the intrapersonal skill on solubility material and solubility product. The design of study was pretest-posttest control group design. The independent variable was the problem based learning model, while the dependent variable was the intrapersonal skill. The subjects of the study were students of class XI MIA 5 as experimental class and students of XI MIA 4 as control class. Intrapersonal skill was measured descriptively from the results of questionnaire and observation, while conceptual understanding was measured with essay test. The results of the study indicated that the conceptual understanding of experimental class was higher than the control class. The test results showed the tcount of conceptual understanding 5.54 which is higher than the tcritical1.66, hence the conceptual understanding of experimental class is better than the control class. The classical comprehension of conceptual understanding for experimental class and control class of was 86.49 % and 32.43 %. The results showed that the intrapersonal skill of experimental class student is higher than control class students. The self-reflection aspec increased from 12.86 with good criterion to 16.43 with excellent criterion. Emotional processing aspect increased from 13.22 to 15.86 with good criterion. Metacognition aspect increased from 23.78 with good criterion to 26.19 with excellent criterion. Based on the results of the study, it can be concluded that the problem based learning model effectively improves the conceptual understanding and intrapersonal skill of class XI Senior High School.