English abstract
Psychometric properties of the test of non-verbal intelligence (TONI-4) for
students of the first cycle of basic education in Muscat Governorate
Laila Hamood Mohammed Al Manji
This study aimed to know the psychometric properties of the test of non-verbal
intelligence (TONI-4) on a sample (N = 715) of students enrolled in government
schools in the Governorate of Muscat. They ranged between six to nine years during
the academic year 2019/2020. To achieve the goal of the study, the sample consisted
of boys and girls from cycle one of classes. The study used appropriate statistical
methods to verify the assumptions of the item response theory (Unidimensionality,
local independence, Item fit). The validity of the test was also verified in a number
of ways, like: criterion validity, factorial validity, concurrent validity, and
discriminant/divergent validity. The reliability of the test was also verified by the
Cronbach's alpha and the reliability factor according to the Item response theory.
The results indicated that the Test of Non-verbal intelligence (TONI-4) has an
acceptable degree of reliability and validity.
