TY JOUR TI Measuring the results of pedagogical research KW research methods in pedagogy KW statistical methods in pedagogy KW measuring learning outcomes KW measuring educational outcomes JO Vestnik of the St. Petersburg University of the Ministry of Internal Affairs of Russia AU Geyzhan, N.F. AU Ilakavichus, M.R. PY 2021 IS 2021 PB SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION