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Badrun Kartowagiran
Faculty of Engineering, Universitas Negeri Yogyakarta
Education

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Parallel tests viewed from the arrangement of item numbers and alternative answers Badrun Kartowagiran; Djemari Mardapi; Dian Normalitasari Purnama; Kriswantoro Kriswantoro
REID (Research and Evaluation in Education) Vol 5, No 2 (2019): December
Publisher : Program Pascasarjana Universitas Negeri Yogyakarta & HEPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/reid.v5i2.23721

Abstract

This research aims to prove that a parallel test can be constructed by randomizing the test item numbers and or alternative answers' order. This study used the experimental method with a post-test only non-equivalent control group design, involving junior high schools students in Yogyakarta City with a sample of 320 students of State Junior High School (SMPN) 5 Yogyakarta and 320 students of SMPN 8 Yogyakarta established using the stratified proportional random sampling technique. The instrument used is a mathematics test in the form of an objective test consisting of a five-question package and each package contains 40 items with four alternatives. The test package is randomized in the item numbers' order from the smallest to the largest and vice versa. The options in each item are also randomized from A to D and vice versa. Each item is analyzed using the Classical Test Theory and Item Response Theory approaches, while data analysis is done using the discrimination index with Kruskal-Wallis test technique to see the differences among the five-question packages. The study reveals that the result of item analysis using the Classical Test Theory and Item Response Theory approaches shows no significant difference in the difficulty index among Package 1 until Package 5. Nevertheless, according to the Classical Test Theory, there is a category shift of the difficulty index of Package 2 until Package 5 when compared to Package 1 – the original package – which is, in general, not a good package, because it contains too easy items.
A construct of the instrument for measuring junior high school mathematics teacher's self-efficacy Rachmadi Widdiharto; Badrun Kartowagiran; Sugiman Sugiman
REID (Research and Evaluation in Education) Vol 3, No 1 (2017): June
Publisher : Program Pascasarjana Universitas Negeri Yogyakarta & HEPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/reid.v3i1.13559

Abstract

The aim of this study was to develop a construct of the instrument for junior high school mathematics teacher self-efficacy and its mapping in the Special Region of  Yogyakarta. The population was 816 junior high mathematics teacher and a sample of 274 teachers was selected through proportionate random sampling technique. The data were analyzed using Confirmatory Factor Analysis (CFA), using software Lisrel 8.80 through the first order and the second order stages. The result of data analysis toward four dimensions obtained: 11 fit items for dimension of personal efficacy (PE), 12 fit items for dimension of general teaching efficacy  (GTE), 13 fit  items for dimension of subject matter teaching efficacy (STE), and 8 fit items for dimension of outcome efficacy (OE). Afterward, the result of selecting 54 items in the first order stage was examined for the second order CFA which obtained Chi-Square = 297.58; df = 271; p-value = 0.12824; RMSEA = 0.019, which showed the model was fit to the data and obtained 25 fit items.  The loading factors for each dimension PE, GTE, STE, and OE consecutively were: 0.46; 0.84; 0.89, and 0.92, and mapping of mathematics teacher self-efficacy level, which showed: 43.07% in low category, 55.47% in medium category (55.47%) and 1.46% in the high category.
A factor analysis of an instrument for measuring physical abuse experience of students at school Safrudin Amin; Badrun Kartowagiran; Pracha Inang
REID (Research and Evaluation in Education) Vol 4, No 1 (2018): June
Publisher : Program Pascasarjana Universitas Negeri Yogyakarta & HEPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (534.2 KB) | DOI: 10.21831/reid.v4i1.18831

Abstract

Violence in schools is increasingly reported by the mass media. It indicates that its prevalence is escalating. An instrument which has a proper psychometric property is needed to investigate the phenomenon. The study aims to develop an instrument for measuring physical abuse experienced by students in schools and explore the construct of the instrument. To pursue those objectives, the content validitity, construct validity, and reliability analysis on the developed instrument were measured. Its content validity was confirmed through expert judgment, construct validity was proven through exploratory factor analysis, and reliability was estimated through Cronbach’s alpha coefficient. Experts considered that the content of all items were relevant, though they also suggested some improvement in wordings for greater clarity. The exploratory factor analysis on 31 items indicates that seven items need to be dropped and 24 items are divided into three factors called (1) victimized by friends with the loading factor ranging from 0.44 to 0.69, (2) victimizing friends with the loading factor ranging from 0.45 to 0.66, and (3) being victimized by teachers with the loading factor ranging from 0.57 to 0.68. The reliability of the test was 0.874. Based on this result, the developed instruments consist of three factors with good validity and reliability.
Co-Authors Amin, Safrudin Dian Normalitasari Purnama Djemari Mardapi Kriswantoro Kriswantoro Pracha Inang Rachmadi Widdiharto Sugiman Sugiman