Ani Sutiani
Medan State University

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Analysis of Students' Initial Ability Based on Generic Science Skills in Reaction Rate Material Yani Kartini Situmorang; Marudut Sinaga; Ani Sutiani; Ratu Evina Dibyantini; Zainuddin Muchtar
Jurnal Inovasi Pembelajaran Kimia (Journal of Innovation in Chemistry Education) Vol 5, No 1 (2023): APRIL 2023 EDITION
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jipk.v5i1.43133

Abstract

This writing aims to determine the validity of the test instrument and initial results scholastic ability test and KGS-based final evaluation test instrument on reaction rate material. This research uses Research and Development research and development methods. The research subject was class XI B which consisted of 36 students. This study used a scholastic test instrument and a final chemistry evaluation with 20 questions each. Based on the results of the validation test by the expert validator, it can be seen that the average percentage results obtained for Material Aspects are 87.08%, Construction Aspects are 87.92%, Language Aspects are 89.17%, and Additional Rules are 100%. The Scholastic test instrument consists of 20 questions that are tested on students namely; 17 valid questions and 3 invalid questions. The results of the final evaluation ability test were 20 items tested on students, 18 questions were valid and 2 questions were invalid. Scholastic ability test trials obtained namely; 3% "very poor", 16% "poor", 39% "enough", 14% "good" and 28% "very good", while the final chemistry evaluation test was obtained namely; 0% is "very less". 11% "poor", 31% "poor: 25% "good" and 33% "very good".
Analysis of Rasch Model for the Validation of Chemistry National Exam Instruments Ayi Darmana; Ani Sutiani; Haqqi Annazili Nasution; Ismanisa Ismanisa*; Nurhaswinda Nurhaswinda
Jurnal Pendidikan Sains Indonesia Vol 9, No 3 (2021): JULY 2021
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (417.46 KB) | DOI: 10.24815/jpsi.v9i3.19618

Abstract

Information about score obtained from a test is often interpreted as an indicator of the student's ability level. This is one of the weaknesses of classical analysis that are unable to provide meaningful and fair information. The acquisition of the same score if it comes from a test item with a different level of difficulty, must show different abilities. Analysis of the Rasch model will overcome this weakness. The purpose of this study was to analyze the quality of the items by validating the national chemistry exam instrument using the Rasch model. The research sample was 212 new students of the Department of Chemistry at the State University of Medan. The data collected was in the form of respondent's answer data to the 2013 chemistry UN questions, which amounted to 40 items multiple choice and uses the documentation method. Data analysis technique used the Rasch Model with Ministep software. The results of the analysis show the quality of the Chemistry National Exam (UN) questions is categorized as very good based on the following aspects: unidimension, item fit test, person map item, difficulty test level, person and item reliability. There is one item found to be gender bias, in which men benefit more than women. The average chemistry ability of respondents is above the average level of difficulty of the test items