TY JOUR TI Adaptive testing model with gradation of tasks by levels of assimilation KW adaptive testing KW learning levels KW assessment model KW individualized learning KW algorithm concept KW feedback in learning JO Vestnik of Astrakhan State Technical University. Series: Management, computer science and informatics AU Medyankina, E.. PY 2025 IS 2025 PB Astrakhan State Technical University