Table 7.

Top 20 keywords that published papers on adaptive learning.

Rank	Keywords	Count	Centrality
1	Intelligent tutoring systems	80	0.11
2	Performance	64	0.14
3	Students	59	0.14
4	Education	53	0.18
5	Model	43	0.14
6	Medical education	43	0.05
7	Design	41	0.12
8	Knowledge	38	0.10
9	Impact	37	0.20
10	Task analysis	35	0.11
11	Strategy	30	0.10
12	Motivation	30	0.05
13	Science	29	0.06
14	Interactive learning environments	28	0.06
15	Teaching/learning strategies	28	0.10
16	Adaptive learning	27	0.06
17	Feedback	26	0.20
18	System	24	0.06
19	Adaptive expertise	24	0.01
20	Achievement	24	0.20