“…Currently, a large number of methods have been created that allow the examination of SMDD children (Baryaeva, 2003;Baryaeva, Gavrilushkina, Zarin, & Sokolova, 2012;Baryaeva et al, 2010;Boryakova, 2000;Levchenko & Zabramnаyа, 2003;Morozov, 2015;Morozova, 2007;Nefedova, 2010;Shipicyna, 2002;Shipicyna, 2012;Strebelevа, 1998;Strebeleva, Mishina, Razenkova, Orlova, & Shmatko, 2004;Strebeleva, Venger, & Ekzhanova, 2002;Strebeleva & Zakrepina, 2018;Vereshchaga, Moiseeva, & Pajkova, 2017;Zabramnaya, 1988Zabramnaya, , 1998Zabramnaya, , 2005Zabramnaya & Borovik, 2003;Zarin, 2015;and others), however, their use requires systematization, and may not be used for all children in this group. So, for example, the work by L. M. Shipitsyna (2002) describes the features of the diagnosis of sensory-perceptual functions and social development of children and adolescents with moderate, severe, and deep mental retardation, as well as social skills of young people with these features.…”