Psychometric properties of math efficacy beliefs using generalized partial credit model

Farokhi, Nooarali; Herfedoost, Mansour; Mohamadjani, Hiva; Jabari, Soraya; Raai, Farzaneh

doi:10.22054/jem.2015.794

Psychometric properties of math efficacy beliefs using generalized partial credit model

Document Type : Research Paper

Authors

nooarali farokhi

Mansour Herfedoost

Hiva Mohamadjani

Soraya Jabari

Farzaneh Raai

https://doi.org/10.22054/jem.2015.794

Abstract

Context: the math efficacy beliefs instrument was developed by Huinker, Enochs (1995). However, research review implied that there is conflicting results. Goal: current research was conducted to investigate psychometric properties of math efficacy beliefs using G-PCM, an item-response model for polytomous model, on teachers samples. Method: 332 Tabriz city elementary schools teachers were chosen randomly and the math efficacy beliefs was administrated them. Results: Alfa coefficients for two subscales of the instrument were .82 and 0.85 for outcome expectancy and efficacy beliefs respectively. In spite of acceptable classical results, generalized partial credit model results implied that the scale items had major problems. Results showed that all difficulty coefficients were negative, i.e simple items., and information functions only best in low-ability part. Discussion: given the importance of math efficacy beliefs, developing new and efficient instrument with good psychometric properties are advised.

Keywords

Math efficacy beliefs

polytomous item-response models

generalized partial credit model