Constructing an Attitude Scale for Mathematics Teachers towards Problem Solving, According to Rasch Rating Scale Model

This study aimed at constructing an attitude scale for mathematics teachers toward problem solving according to rating scale model derived from Rasch model. To achieve this, the concept of problem solving was defined, and a preliminary likert rating scale of 57 items was constructed. 39 items were retained as a result of judgment process and piloting. The scale was applied on a randomly chosen sample consisted of 257 mathematics teachers. SPSS & BIGSTEBS & Bilog-MG3 were used to analyze the data. Findings of the analysis indicated that 36 items fit the assumptions of rating scale model derived from Rasch model. The mean and the standard deviation values for the difficulty of items were approximately equal to the expected values by the model. Also, the scale in its final form exemplified several suitable validity and reliability indicators. The Findings also revealed that the scale presents the maximum amount of information (MI) for persons with moderate ability. The mean of ability values was ?= 6.492 at the ability level 0.058.