From: An intelligent vocabulary size measurement method for second language learner
Robot tester quantities
10
30
50
70
90
110
The IVST
67.36%
73.38%
81.74%
93.35%
97.94%
98.49%
The IVST with LSTM
66.93%
75.64%
89.38%
96.45%
99.83%
99.87%