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Table 4 Correlation of DIFi with FDs/item and DISi with FDs/item of 350 BAQ items

From: How important is distractor efficiency for grading Best Answer Questions?

 

DIFi - FD

DISi - FD

Pearson correlation r

− 0.66 (Sig. 0.000)

0.317 (Sig. 0.000)

Spearman’s rho

− 0.705 (Sig. 0.000)

0.347 (Sig. 000)

  1. Correlation is significant at the 0.01 level (2-tailed)
  2. DIFi difficulty index; DISi discrimination index; FD  functional distractors per item
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