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Table 5 Test scores vs. TOEIC score for each student group

From: Controlling item difficulty for automatic vocabulary question generation

  G1 G2 G3
Number of students 31 28 29
TOEIC avg 606.33 594.07 596.42
  (SD: 166.11) (SD: 170.81) (SD: 178.37)
Test score avg .496 .471 .581
  (SD:.1) (SD:.1) (SD:.09)
TOEIC-Test score corr. .693 .612 −.09