The aim of the current study is to conduct reliability and validity of tests which have been used for complex attention part of executive functions from 8 to 11 years

The aim of the current study is to conduct reliability and validity of Stroop Color Word, Children?s Color Trails, Verbal Fluency and Symbol Digit Modalities Tests which have been used for complex attention part of executive functions. The sample consists of 160 students ranging from 8, 9 and 10 years of age and 3th to 5th graders receiving education in a private school of Istanbul. Reliability and validity sample consists of 20 participants who have been diagnosed clinically in the neurology department of Capa Medicine Faculty. The participants were delivered the Stroop test to assess selective and focused attention, the Children?s Color Trails Test for visual perception and trail, the Semantic and Fonemic fluency tests for verbal fluency and the Symbol Digit Modalities test for visual tracking, visual trail and permanent visual attention. For test-retest validity and reliability study, 15 randomly selected participants from the sample took the Trail, WISC R code and the Stroop T-Bag Tests additionally. The data of the study has been analyzed with descriptive statistics, validity and reliability tests. It has been found that Stroop, Children?s Color Trails , Verbal Fluency and Symbol Digit Modalities tests are reliable and valid assessment instruments for healthy and clinically diagnosed Turkish children ranging from 8 to 11 years of age.