Fig. 3

Percentage of students who fall into each category of expertise. The majority of students used mixed models, though a small portion of these also included non-adaptive factors into their explanations (shaded gray). A large portion of students also held pure adaptive models and would therefore be considered emerging experts. Only advanced majors reached expert-like levels of reasoning and these students used adaptive vs. non-adaptive models. No students held adaptive + non-adaptive models of evolutionary reasoning