This study is part of the Swedish–German cooperation project “EvoVis: Challenging Threshold Concepts in Life Science—enhancing understanding of evolution by visualization,” funded by the Swedish Research Council (VR 2012:5344, LT). We thank the whole EvoVis group and Dr. Jörg Großschedl and Charlotte Neubrand for helpful discussions that contributed to this study. Special thanks to Dr John Blackwell for the language review and valuable and insightful comments on evolution aspects of the paper. We are also very thankful to the students who participated in this study and the experts for their comments on the instruments.