Re-calibrating and Re-standardization of Teacher Rating Scale of the Characteristics of Gifted Children in Basic Education Phase Using Rasch Model

Salah F. Bakhiet


The Arabic scale for teachers' rating of basic education gifted students' characteristics is considered one of the commonest Arabic measures used for initial identification of gifted students in some Arabic countries. One of the shortcomings of this scale, however, is that it is based on the classical theory of measurement. This study sought to recalibrate and re-normalize the scale in the light of Rasch's unidemisional model which rests upon the modern theory of measurement and to develop different criteria for interpreting the levels of individuals' traits. The scale was administered to 830 Basic Education students in Khartoum (age ranged from 7 to 12 years). Two groups of students participated 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 items were deleted for not conforming to Rasch's model. This left the scale with 31 items. Besides, new criteria for the scale were developed by obtaining the tscores that match the various ratings of the individuals' ability.



Gifted students, modern theory of measurement, Rash model, teacher rating of gifted students.

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Copyright (c) 2017 Salah F. Bakhiet


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