Revalidating the Arabic Scale for Teachers' Ratings of Basic Education Gifted Students' Characteristics Using Rasch Modeling

The Arabic scale for teachers' ratings of basic education gifted students' characteristics is one of the most common Arabic measures used for initial identification of gifted students in some Arabic countries. One of the shortcomings of this scale is that it is based on the classical theo-ry of measurement. This study sought to revali-date the scale in the light of Rasch modeling which rests upon the modern theory of meas-urement and to develop different criteria for interpreting the levels of individuals' traits. The scale was administered to 830 of Basic Educa-tion students in Khartoum (ages ranged from 7 to 12 years). Two groups of students participat-ed in the study: a calibration sample (N = 250) and a standardization sample (N = 580). The statistical treatments were performed using the PSAW 18 and RUMM 2020 programs according to Rasch's unidimentional model. Six of the scale's items were deleted for not conforming to Rasch Modeling. This left the scale with 31 items. Besides, new criteria for the scale were developed by obtaining the t-scores and special education scores that match the various ratings of the individuals' ability.