PENERAPAN MODEL PROBLEM BASED LEARNING UNTUK MENINGKATKAN KEMAMPUAN KOMUNIKASI DAN DISPOSISI MATEMATIS

This quasi experimental research aimed to determine the increasing of mathematical communication skills and dispositions of students who though by PBL compared to conventional learning. The design which was used was pretest-posttest control group design. The population of this research was all students of grade VIII of SMP Tri Sukses Natar South Lampung regency in the academic year of 2015/ 2016 and samples of this research were students of VIII-B and VIII-C class that were determined by purposive random sampling. Based on the research results, it was concluded that the implementation of problem based learning model could not increase student's mathematical communication skills, but it could increase student's mathematical disposition. Penelitian eksperimen semu ini bertujuan untuk mengetahui peningkatan kemampuan komunikasi dan disposisi matematis siswa yang mengikuti PBL dibandingkan dengan konvensional. Desain yang digunakan adalah pretest-posttest control group design. Populasi penelitian ini adalah seluruh siswa kelas VIII SMP Tri Sukses Natar Kabupaten Lampung Selatan tahun pelajaran 2015/ 2016 dan sampel penelitian adalah siswa kelas VIII-B dan VIII-C yang ditentukan dengan teknik purposive random sampling. Berdasarkan hasil penelitian, diperoleh kesimpulan bahwa penerapan model problem based learning tidak dapat meningkatkan kemampuan komunikasi matematis siswa, namun dapat meningkatkan disposisi matematis siswa. Kata kunci: disposisi matematis, komunikasi matematis, problem based learnin