The paper considers the possibility of using the unified speech recording protocol for research of speech in typically and atypically developing children. The research protocol includes using the model situations: dialogue, repetition, picture description, and playing. The peculiarities of speech recording in model situations for children with atypical development are described. The data on the speech of children with autism spectrum disorders, Down syndrome, and intellectual disabilities obtained in model situations are presented. The perspectives of future work taking into account creating an interactive computer program - a virtual assistant ("friend") to avoid the contribution of individual characteristics of the experimenter and parents in the model situations are discussed.