Fig. 1
From: Freshman Undergraduate Biology Students’ Difficulties with the Concept of Common Ancestry
Students’ responses to version C of the survey. Question designations refer to the designations in Table 2. The vertical bars indicate the fraction of student responses at each level for each question: level 1 (“Strongly Disagree”) at the bottom; level 5 (“Strongly Agree”) at the top. The stepped diagonal lines indicate the predicted breakpoints between each of the levels for each question produced by the POLR model