How Students Think about Experimental Design: Novel Conceptions Revealed by in-Class Activities, Crowe Alison J, Wenderoth Mary Pat, Brownell Sara E, Theobald Roddy, Okoroafor Nnadozie, Koval Mikhail, Freeman Scott, and Walcher-Chevillet Cristina L, BioScience, 02/2014, Volume 64, Issue 2 (2014)