Abstract:
This study was aimed to investigate effects of matrix representation training on students logical problem-solving ability. The sample consisted of 78 Mathayom Suksa three students of Plongvithayakom school of Amphare Thoeng, Chaingrai Province. The two-stage sampling was used to form two experimental groups and one control group within the pretest-posttest experimental control group research design. The two experimental groups received the training of matrix problem representation for eight sessions, each session for 50 minutes. After the experiment, the three groups were tested for their logical problem-solving ability. In the testing, the first experimental group was asked to used matrix representation while the second experimental group and the control group were allowed to use any representation in their problem-solving performance. The scores of logical problem solving ability before and after experiment were analyzed by the t-test within group, the one-way analysis of variance between group and Tukey multiple comparisons. The findings indicated that (1) The group of students who were trained matrix representation and asked to used matrix representation, had higher score of problem-solving ability than the control group at the .05 level of significant; (2) The group of students, who were trained matrix representation and allowed to used any type of representation, had higher score of problem-solving ability than the control group at the significant level of .05; (3) The score of problem solving ability of the group of students who were trained matrix representation and asked to use matrix representation were not significantly different from the group of students who were trained matrix representation and allowed to use any type of representation.