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. Test-retest and parallel form application were made for reliability analyses, and Raven Standard Progressive Matrices Test (RSPM) and Naglieri Nonverbal Ability Test (NNAT-I) tests were applied for validity analyses.

Results: It has been found that the TONI-3 Test has a high reliability with an average reliability coefficient of 0.92. It was determined that there was a high, positive and significant relationship between Form A and Form B of the TONI-3 Test (r=0.76, p<0.01). The correlation coefficient between the scores was found to be 0.83 between the first application of the TONI-3 test and the test repeated after 4 weeks. A high, positive and significant correlation was found between TONI-3 Test, RSPM Test and NNAT-I (r=0.69, p<0.01; r=0.81, p<0.01).

Conclusion: This study revealed evidence of the reliability and validity of the TONI-3 test between the ages of 14-17. This is the first study of the TONI-3 test in this age group. It is thought that clinicians can practically evaluate cognitive abilities in children who are clinically referred to or determined to have behavior disorders at school through this test.