Fig. 3
From: Measuring evolution learning: impacts of student participation incentives and test timing
Percentage of respondents with a consistent scientific model at the pre-test, final exam, and post-test. The students in these plots reflect those who completed the assessment at all three time points. In the interest of space, note that the x-axis of the graphs does not represent the chronological time distance between each test administration time point. The pre-test and final exam were 13–14 weeks apart and the final exam and post test were under two weeks apart