Turkish Early Language Development Test-TELD-3
TEDIL is the Turkish adaptation of the Test of Early Language Development (TELD-3) language development test. The test is an individually administered, norm-referenced test that aims to measure the receptive and expressive verbal language skills of children between the ages of 2 years 0 months and 7 years 11 months (Hresko et al., 1999). The test results can be used for purposes such as diagnosing children with language disorders in the early stages, showing the weak and strong aspects of their language development, giving information about the development process and conducting research.
TEDİL consists of parallel forms, A and B. Each form includes two subtests, namely Receptive and Expressive. These subtests consisted of items measuring the semantics, morphology and syntax domains of the language. Each form has a total of 76 items. In some of these items, showing pictures or descriptions are covered, and in others, fulfilling verbal instructions and responding to questions verbally.
TEDIL has five purposes: (a) to identify children who are significantly behind their peers in terms of the development of early language skills and thus to ensure that they receive early intervention, (b) to individually identify their verbal strengths and weaknesses, (c) the child's possible receivables. to define the program and process in a language therapy, (d) serve as a scale for researching language skills in early childhood, and (d) support other assessment techniques.
TEDIL, which started to be adapted into Turkish in 2005 and whose final version was given in 2009, covers three of the five basic components of the language (semantics, morphology and syntax). The phonology component was not included in the original test by the authors due to the existence of pragmatics that can be measured in the natural environment and many measurement tools available.
After the pilot studies of TEDIL were completed, validity and reliability and standardization studies were carried out. In this process, AERA, APA, NCME's (1999) Measurement Standards in Education and Psychology were used (Ramos et al., 2006). In TEDIL's reliability study, alternative forms analysis and inter-rater reliability analyzes were conducted to determine internal consistency, stability and equivalence. Content validity, criterion validity, and construct validity analyzes were performed for the validity study. As a result, TEDIL is a highly valid, reliable measurement tool with 1627 participants and a highly representative group, whose norms have been determined and it has been proven to be distinctive.
It is applied only by speech and language therapists who have received TEDİL training and have TEDİL certificate in Turkey.