In this study, it is aimed to investigate the results obtained from the methods based on PISA 2015 data with the help of Self-Organizing Map, K-Means and Two-Stage Clustering Method. For this purpose, it is aimed to determine ...

The aim of this study is to research whether or not the attitude items towards sciences in PISA 2015 student questionnaire including differential item functioning (DIF) in terms of language and culture. Generalized Mantel ...

The purpose of this study is to investigate the effects of number of response options on psychometric properties of Likert-type scale for used with children. Accordingly, 1092 2nd and 3rd grade children from 11 different ...

The purpose of this research study is to identify items with culture-related and/or gender-related differential item functioning (DIF), and examine the level of DIF manifested among a set of binary-scored science items ...

The purpose of this study is to determine whether there is DIF in the PISA 2015 reading section items from Singapore, Australia and the United States by employing the Mantel-Haenszel and the Logistic Regression methods. ...