The Validity and Reliability Study of TONI-3 Test for 4-17 Aged Children.

Introduction: Since there are not enough scales to evaluate the cognitive performance of adolescents in Türkiye, the aim of this study is to conduct a reliability and validity study of the Test of Nonverbal Intelligence-3 (TONI-3) for individuals aged between 14 and 17.

Methods: A total of 566 children between the ages of 14-17 were included in the study. A form of TONI-3 test was administered to all participants.

Are students with learning disabilities correctly diagnosed in Turkey?

There has been an ongoing debate on how to diagnose learning disability (LD), with experts proposing different approaches. Very limited research is available on the diagnosis of LD in Turkey. This study aims to analyze the problems related to the diagnosis of LD in Turkey.

Norm and Standardization Study for Naglieri Nonverbal Ability Test, 5-9 Age Group.

Background: The aim of the present study was to test the Naglieri Nonverbal Ability Test for children in the 5-9 age group and to determine the psychometric attributes of this tool. Intelligence is a complex and abstract concept. Therefore, it is not possible to observe or measure directly.