From the abstract: "Groups of five to seven students were assigned learning activities as treatments in a Latin Square design consisting of three experimental periods. At the beginning of selected laboratory sessions, students completed 10 minutes of the experimental activity immediately followed by a questionnaire. Students rated hands-on, problem-based laboratory stations as more challenging, novel, and attention-grabbing than they rated case studies or video lectures. Interest, intrinsic motivation, and behavioral engagement were greatest for groups completing laboratory stations followed by those completing case studies and lectures, respectively."

Erickson, M., Marks, D., & Karcher, E. L. Integrating extension educators in agricultural study abroad programming. NACTA Journal, 63, 156-163. https://eric.ed.gov/?id=EJ1251142