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. 2019 Spring;18(1):ar2. doi: 10.1187/cbe.18-08-0152

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© 2019 L. S. Blumer and C. W. Beck. CBE—Life Sciences Education © 2019 The American Society for Cell Biology. “ASCB®” and “The American Society for Cell Biology®” are registered trademarks of The American Society for Cell Biology.

This article is distributed by The American Society for Cell Biology under license from the author(s). It is available to the public under an Attribution–Noncommercial–Share Alike 3.0 Unported Creative Commons License.

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FIGURE 6. — Mean posttest experimental design skills score (mean ± SE) among pretest quartiles in study 2. Experimental design skills were assessed using the EDAT (Sirum and Humburg, 2011). In each quartile, we show the mean composite EDAT posttest score (orange, maximum possible score = 10), the mean basic understanding posttest score (yellow, maximum possible score = 4), and the mean advanced understanding score (green, maximum possible score = 3). There are significant differences among quartiles in composite posttest score (F(3,135) = 6.74, p < 0.001) and basic understanding posttest score (F(3,135) = 3.96, p = 0.01), and marginally significant differences among quartiles in advanced understanding posttest scores (F(3,135) = 2.52, p = 0.06). These results are for 145 students from nine courses at six different institutions.