Analysis of instruments and mathematical disposition using Rasch model

Abstract

The purpose of this study is to analyze the instruments and mathematical dispositions of students. The instrument consisted of 22 items of mathematical disposition statements. Instrument testing was conducted on 18 private vocational students consisting of 6 males and 12 females. Analysis of the instruments and students’ mathematical dispositions was carried out using the Rasch model. The aspects analyzed consisted of mathematical disposition instruments, students ‘mathematical disposition abilities, the interaction between the instruments and students’ abilities of mathematical dispositions, and instrument quality. The results of the analysis of mathematical disposition instruments show that there are four items of instruments with difficult categories, thirteen items with medium categories, and five items with easy categories. Generally, the ability of students’ mathematical disposition is still low, compared to the demands of instrument difficulty. The interaction between instruments and students’ mathematical disposition abilities is very good. The consistency of answers from students is good, and the quality of the mathematical disposition instruments is sufficient.