Ibrohim Aji Kusuma, Heri Retnawati
This study aims to analyze the characteristics of the item test of mathematics midterm exam of 11th grade secondary students. This study was quantitative research using a descriptive explorative approach. The midterm script and its answer key ware validated by three expert and students answer sheet was analyzed using classical test theory method using QUEST. The midtest test script and its answer key were valid with score 0.93 using Aiken index and the internal consistency score was 0.74. It means that the midtest script was feasible in learning but cannot be used to reflect students' knowledge and skills. Fit Pt-biserial score was 52.5% and Low Pt-biserial score was 47.5%. The difficult items consist of the arithmetic series related to real problems, infinite geometric series, algebraic limits with substitution of fraction forms containing roots and factorization of fraction forms containing exponential. Copyright © 2020 EAI
Graduate School Program, Universitas Negeri Yogyakarta, Jl. Colombo No. 1, Yogyakarta, Indonesia; Faculty of Mathematics and Science, Universitas Negeri Yogyakarta, Jl. Colombo No. 1, Yogyakarta, Indonesia
