“…Students No. 1,3,6,8,10,11,12,14,15,17,18,19,20 were selected as a group (high group), with the best performance and an mean value of 89.7; Students No. 2,4,5,13,22,21,23,26,28,33,34,36,38 were selected as group 2 (middle group), with mean value of 75.5; Students No.…”