Table 1

Number and effects of first and second/additional answer changes

Answer change

n of students

M (SD) of changes (%)

M (SD) of changes WR (%)

M (SD) of changes RW (%)

M (SD) of changes WW (%)

M (SD) of point increase

First

72

4.5 (3.0)

2.3 (2.0)

0.9 (1.0)

1.3 (1.3)

1.4 (2.2)

5.2%

48.2% (30.3)

21.6% (22.3)

30.2% (27.6)

2.5% (4.2)

Second and additional

19

1.4 (0.96)

0.21 (0.42)

0.11 (.32)

1.1 (0.94)

0.11 (0.46)

0.44%

18.4% (38.0)

3.7% (12.1)

77.9% (41.6)

0.19% (0.99)

M, mean; SD, standard deviation.

Bauer et al. BMC Medical Education 2007 7:28   doi:10.1186/1472-6920-7-28