KELAYAKAN INSTRUMEN TES DIAGNOSTIK MISKONSEPSI BERFORMAT FOUR TIER UNTUK MENGUNGKAP MISKONSEPSI SISWA PADA MATERI HUKUM NEWTON

FEASIBILITY OF A FOUR TIER MISCONCEPTION DIAGNOSTIC TEST INSTRUMENTS TO REVEAL STUDENTS MISCONCEPTION ON NEWTONS LAW TOPIC

Penelitian ini bertujuan untuk menganalisis kelayakan instrumen tes diagnostik miskonsepsi berformat four-tier yang ditinjau dari aspek validitas dan reliabilitas serta mengungkap miskonsepsi siswa pada materi Hukum Newton. Instrumen tersebut dikembangkan dengan menggunakan metode Research and Development (R&D) kemudian dilakukan validasi teoritis dan empiris. Validasi teoritis dilakukan oleh 3 dosen ahli sementara validitas empiris melalui uji coba 1. Hasil validasi teoritis menunjukkan bahwa instrumen tergolong sangat valid. Selain itu, instrumen juga diuji cobakan sebanyak dua kali, yaitu uji coba 1 dan uji coba 2. Uji coba 1 dilakukan untuk menganalisis validitas empiris dan reliabilitas instrumen dengan sampel 50 siswa kelas XIMIPA. Validitas empiris meliputi aspek materi dan konstruk. Validitas empiris materi diperoleh berdasarkan persentase false negatives dan false positives sedangkan validitas empiris konstruk diperoleh dari nilai korelasi product moment (r_xy) sebesar 0,478. Berdasarkan hasil yang diperoleh maka instrumen dinyatakan valid. Indeks reliabilitas instrumen dengan menggunakan persamaan koefisien reliabilitas Alfa Cronbach bernilai 0,847 dan dinyatakan reliabel. Uji coba 2 dilakukan untuk mengungkap profil miskonsepsi siswa kepada 32 siswa kelas X MIPA. Hasil uji coba 2 menunjukkan bahwa persentase miskonsepsi terbesar yang dialami oleh siswa terdapat pada konsep Hukum II Newton dan Gaya Berat.

This study aims to analyze the feasibility of a four tier misconception diagnostic test instrument in terms of validity and reliability and reveal the profile of students on Newtons Law topic.The instrument was developed using the Research and Development (R&D) method then was do theoretical and empirical validations.The theoretical validation conducted by 3 expert lecturers while empirical validation went throught Trial 1. The results of theoretical validation showed that the instrument was classified as very valid. In addition, the instrument was also tested twice, namely Trial 1 and Trial 2. Trial 1 was conducted to analyze the empirical validity and reliability of the instrument with a sample to 50 XI MIPA students.Empirical validity consists of material and construct aspects. The empirical validity of the material is obtained based on the percentage of false negatives and false positives while the empirical construct validity is obtained from the product moment correlation value (r_xy) of 0,478. Based on the results obtained, the instrument can be declared valid. The instruments reliability index using the Alfa Cronbach reliability coefficient equation is 0,847 which is declared reliable. Trial 2 was conducted to reveal the profile of students' misconceptions with a sample to 32 X MIPA students. The results of trial 2 show that the largest percentage of misconceptions experienced by students lies in Newton's Second Law and Weight concepts.