“…In the research conducted by Ustun, Akman & Uyanık (2000) on children from a total of 143 different socioeconomic levels, 47 from the lower socioeconomic level, 46 from the middle socioeconomic level and 50 from the upper socioeconomic level, they tried to determine the maturity levels using a scale consisting of six sub-tests: word comprehension, sentences, general information, matching, numbers and copying, and there was a significant difference between the socioeconomic levels and school maturity. Koç ak, Ergin & Yalçın (2014) conducted a survey on 292 children in order to determine the factors that affect children's level of Turkish language use. The result of the study is that the variables of age, gender, educational background of the family and duration of pre-school education were significantly different in the language development levels of the children and that the number of siblings and birth order variables did not cause any significant difference.…”