Fig. 2

Images used to provide the setup for the (a) adaptation and (b) speciation assessments. For each assessment species and for each type of assessment children were shown the past population (left) and the current population (right) as well as the change in habitat (depicted on the second row for each assessment type). Following six closed-ended questions, children were asked the open-ended questions above to assess whether they could self-generate a correct explanation of population change in terms of natural selection