Research design to compare blended vs traditional learning environment

An interesting research on success in mathematics when taught in blended or traditional learning environments. The research question was:

"Are students more engaged in problems solving, more inclined to experience joy, excitement and affection, more confident, and more persistent while doing mathematics in blended or in traditional learning environments?" Read the report:
http://www.eden-online.org/stuff/Radu_Seifert.pdf