[Studying the possibility of using methods for assessing expressive speech developmental disorders in children 3-6 years old].

Objective: To study the possibility of using methods (DP-3, speech therapy examination, neuropsychological study) to assess expressive speech development disorders in children aged 3 to 6 years inclusive.

Material and methods: The study included 60 children with expressive speech disorder aged 3 to 6 years. At the initial stage, linguistic validation of the questionnaire was carried out according to generally accepted recommendations. Two Russian-speaking professional translators in the field of medicine performed a direct translation of the original English-language scale, a reverse translation was carried out by native speakers with medical education. At the final stage of validation, a study of the psychometric indicators of the developed Russian version was carried out.

Results: A Russian-language version of DP-3 has been developed with a high level of reliability, internal consistency and sensitivity. The Pearson correlation coefficient in the test-retest DP3 reliability study was 0.8 (p<0.0001), which confirms the high level of stability of the scale to deviations. In the study of internal consistency in the domain «communicative development» DP-3, the Cronbach's alpha coefficient was 0.83 (p<0.0001), which indicates a high internal consistency for this domain of the Russian version of the DP-3 questionnaire. The values for the domain «communicative development» DP-3 significantly correlated with the results of the speech therapy examination. The values of the DP-3 «communicative development» domain significantly correlated with the indicators of the speech therapy examination.

Conclusion: It was demonstrated that the Russian version of the DP-3 questionnaire is a reliable and valid tool for assessing the level of development of speech communication in preschool children (3-6 years old). DP-3 can serve as a reliable tool for quantitative assessment of the dynamics of speech development against the background of therapeutic and correctional measures.