APLIKASI MODEL PENSKORAN EQUAL WEIGHTING DAN DIFFERENTIAL WEIGHTING UNTUK MENGESTIMASI SKOR KIMIA SISWA

Abstract

Penelitian ini bertujuan untuk: (1) mendeskripsikan karakteristik distribusi skor kimia siswa hasil estimasi dari model penskoran Equal Weighting (EW) dan Differential Weighting (DW), dan (2) melihat kesesuaian skor kimia yang dihasilkan dari penerapan kedua model penskoran tersebut. Penelitian ini merupakan penelitian deskriptif. Data yang diperoleh berupa pola respon siswa SMA terhadap tes try out Ujian Nasional mata pelajaran kimia Tahun Ajaran 2015/2016 di Kota Yogyakarta. Analisis data menggunakan Rasch Model dan korelasi intraklass. Sampel penelitian sejumlah 358 siswa diambil menggunakan teknik cluster random sampling. Hasil analisis menunjukkan bahwa: (1) rerata skor DW lebih tinggi daripada rerata skor EW, namun skor yang dihasilkan lebih menyebar dari reratanya, keduanya memiliki harga skew negatif sehingga distribusinya juling ke kiri dan kurtosis yang platikurtik; dan (2) penerapan model penskoran merubah peringkat siswa karena kesesuaian skor antarmodel penskoran masuk dalam kategori fair agreement.
Kata kunci: kimia, model penskoran, rasch modelTHE PPLICATION OF SCORING MODEL USING EQUAL WEIGHTING AND DIFFERENTIAL WEIGHTING TO ESTIMATE STUDENTS CHEMISTRY SCORE
Abstract
This study aimed to describe: (1) the characteristics of students’ chemistry scores distribution based on the estimation of scoring models using Equal Weighting (EW) and Differential Weighting (DW), and (2) the suitability of students’ chemistry scores distribution based on both scoring model. This study was a descriptive research. The data obtained from students respons pattern on try out test of National Examination on chemistry subject in the academic year 2015/2016 in Yogyakarta. The analysis in this study used the Rasch model and Intraclass Correlation. The sample of this research was 358 students taken by cluster random sampling technique. The analysis shows that: (1) the mean score of WD is higher than the mean score of NR, but the WD score is more spread out from their mean. Both scores have negative skew so that their distribution is left-tailed and has platycurtic kurtosis; (4) the application of scoring models causes the changes of students’ rank because the consistency of students’ scores is in the category of fair agreement.
Keywords: chemistry, scoring model, rasch model