TY JOUR TI SOCIO-DEMOGRAPHIC FACTORS OF THE FAMILY AS A SYSTEMIC BASIS FOR PREDICTING THE DEVELOPMENT OF HIGHER MENTAL FUNCTIONS OF PRESCHOOL CHILDREN KW higher mental functions KW preschoolers KW socio-demographic factors KW material level of the family KW parental education KW sibling position JO Scientific notes of P. F. Lesgaft University AU Nerovnykh, M.S. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft