The Implementation Of Problem Based Learning Model Through Group Investigation In Mathematics Learning Viewed From Student’s Adaptive Reasoning In SMP Negeri 1 Surakartaud

摘要

The purpose of this research is to analyze: (1) the influence of the use of problem based learning model through group investigation to student’s mathematics achievement, (2) the influence of adaptive reasoning ability to student’s mathematics achievement, (3) the interaction between the use of problem based learning model through group investigation and adaptive reasoning ability to student’s mathematics achievement. This research uses an experimental research. The populations are all students of grade VIII of 2012/2013 academic year in SMP Negeri 1 Surakarta. Samples taken in this research as many as twoudclasses, consist of VIII B as experiment class with 27 students and VIII A as control class with 28 students. The sampling technique used in this research is cluster random sampling. Data collection methods used are questionnaire method, method of test and documentation method. Data analysis techniques use two ways analysis of variance with unequal cells, a prerequisite test used the Lillieforsudmethod to normality test and the Barlett method to homogeneity test. From the analysis of data with 5% of significant level, it is satisfied that : (1) there is noudinfluence of the use of problem based learning model through group investigation to student’s mathematics achievement with FA = 3,33, (2) there is the influence ofudadaptive reasoning ability to student’s mathematics achievement with FB = 6,54, and (3) there is no interaction between the use of problem based learning modeludthrough group investigation and adaptive reasoning ability to student’s mathematics achievement with FAB = 0,16.