TY JOUR TI EXPERIMENTAL EVALUATION OF PHYSICAL EXERCISE OPERATIONAL IMPACT ON THE ATTENTION INDICATORS OF PRE-SCHOOL CHILDREN WITH MENTAL RETARDATION AND SPEECH IMPAIRMENT KW physical exercises KW children with asd KW speech disorders KW cognitive processes KW attention KW effectiveness of influence JO Scientific notes of P. F. Lesgaft University AU Semenov, L.A. AU Gukova, T.V. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft