Exploring the effect of mobile-assisted task-based learning on vocabulary achievement and student attitude

Smart Learning Environments

Table 4 Item discrimination and difficulty values of achievement test

Question number	Discrimination value	Difficulty index	Question number	Discrimination value	Difficulty index
1	0.61	0.50	13	0.06	0.90
2	0.87	0.50	14	0.52	0.60
3	0.06	0.90	15	0.65	0.60
4	0.54	0.50	16	0.75	0.60
5	0.75	0.60	17	0.87	0.50
6	0.06	0.80	18	0.75	0.60
7	0.75	0.60	19	0.07	0.40
8	0.87	0.50	20	0.55	0.60
9	0.87	0.50	21	0.71	0.60
10	− 0.16	0.40	22	0.75	0.60
11	0.87	0.50	23	0.52	0.60
12	0.54	0.50	24	− 0.14	0.80