排序

频次

中心性

年份

关键词

1

94

0.07

2002

second language

2

87

0.12

2003

willingness to communicate

3

76

0.02

2002

model

4

60

0.1

2002

attitudes

5

56

0.1

2002

English

6

42

0.15

2002

motivation

7

30

0.16

2002

anxiety

8

30

0.33

2007

confidence

9

14

0.04

2011

personality

10

11

0.03

2010

classroom environment