Objective: Lexical knowledge provides important insights into language development of children. The assessment of this knowledge through valid and reliable tools is an essential step in diagnosing any linguistic problems. The recent study aims to test validity and reliability of the Cross-linguistic Lexical Task—Turkish (CLT-TR) among monolingual preschoolers with and without developmental language disorder. Cross-linguistic Lexical Task is developed to measure the lexical knowledge of mono/bi/multilingual preschool children. The test has 34 different language versions, including Turkish. Cross-linguistic Lexical Task—Turkish consists of comprehension and production subtests for both nouns and verbs with a total of 128 items.
Methods: The participants were 245 typically developed (TD) and 30 children at risk of developmental language disorders (r-DLD), all of whom were Turkishspeaking monolingual children aged between 2.00 and 4.11 years. CLT-TR administered individually to the participants. Maximum score was 30 for each subtest. Scores were compared within and between groups.
Results: The results showed that CLT-TR scores change significantly between developmental groups. Typically developed group had significantly higher scores than children in r-DLD group. Moreover, the test had construct validity evidence by showing significant differences in CLT-TR scores between age groups and parental education levels. These differences were also observed within subtests regarding receptive and productive language skills in nouns and verbs. According to the reliability analysis, the test has high internal consistency, stability, and objectivity.
Conclusion: According to the findings, it can be concluded that CLT-TR is a valid and reliable tool for measuring lexical knowledge of monolingual preschoolers. Cross-linguistic Lexical Task can successfully differentiate TD children from children with r-DLD. This test can be utilized by various professionals working with these age groups across different fields to gain valuable insights into language development firsthand.
Cite this article as: Yılmaz Çifteci N, Tunçer AM. Testing validity and reliability of cross-linguistic lexical task—Turkish (CLT-TR) in preschoolers with and without at risk of language disorder. Arch Health Sci Res. 2024;11(3):148-154.