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Table 5 Item difficulty level and item-total correlations for the Comprehensive Integrative Puzzles (CIP) test

From: An innovative method to assess clinical reasoning skills: Clinical reasoning tests in the second national medical science Olympiad in Iran

  Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9
Item difficulty level 0.90 0.56 0.56 0.59 0.69 0.56 0.39 0.55 0.57
Item-total correlation 0.36 0.67 0.69 0.53 0.66 0.51 0.50 0.69 0.66
  Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18
Item difficulty level 0.50 0.50 0.51 0.67 0.60 0.57 0.72 0.68 0.66
Item-total correlation 0.55 0.67 0.59 0.77 0.64 0.66 0.78 0.77 0.80