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Table 2 Response change patterns and outcomes for block 4

From: Investigation of answer changes on the USMLE® Step 2 Clinical Knowledge examination

  Number of examinees % (Based on all examinees) % (Based on examinees with response change)
Examinees who revisited at least one item 27,560 99.0%  
Examinees who changed at least one response 18,936 68.0% 100%
Examinees with score gain 8461 30.4% 44.7%
Examinees with score loss 5263 18.9% 27.8%
Examinees with unchanged score 5212 18.7% 27.5%
  Mean number of items % (Based on all items) % (Based on items with revisits)
Items with revisits 16.0 36.4% 100%
Items with revisits and no response change 14.6 33.2% 91.2%
Items with revisits and response change 1.4 3.2% 8.8%
W-R 0.59   
R-W 0.40   
R-R 0.03   
W-W 0.38   
W-R/R-W ratio 0.59/0.40 = 1.48   
Overall mean score change 0.004   
  1. W-R wrong to right response changes, R-W right to wrong response changes, W-W wrong to wrong response changes, R-R right to right response changes