Comparing learning outcomes of two collaborative activities on random genetic drift in an upper-division genetics course

Table 4 Results from this study and past studies using the GeDI

Study group	Pre-test mean (standard deviation)	Post-test mean (standard deviation)	Cohen’s d (Lower 95% CI Upper 95% CI)
Faculty-developed activity	12.54 (1.01)*	16.48 (1.27)	1.05 (0.719, 1.38)
SimBio activity	12.75 (1.03)*	18.11 (1.29)	1.55 (1.18, 1.92)
(Price et al. 2016) control	11.66 (1.64)	11.17 (1.45)	− 0.04 (SD = 0.2)
(Price et al. 2016) SimBio activity	13.13 (2.02)	15.38 (2.69)	0.63 (SD = 0.59)
(Tornabene et al. 2018) Northeastern University	12.35 (3.59)	NA	NA
(Castillo et al. 2022) 2016 Genie Activity	14.18 (3.62)	16.46 (3.88)	0.608 (0.408, 0.807)
(Castillo et al. 2022) 2017 Genie Activity	17.18 (3.84)	19.42 (3.23)	0.632 (0.410, 0.855)
(Castillo et al. 2022) 2017 No Genie Activity	16.09 (4.16)	18.61 (3.47)	0.658 (0.430, 0.886)

Pre- and Post-Test average scores are reported in raw scores and standard deviations are reported parentheses next to the scores. Learning gains are reported in Cohen’s D measures with 95% confidence intervals in parentheses. Tornabene et al. (2018) administered the GeDI only once to students as measuring learning gains was not an objective of that study so Post-Test average score and Cohen’s D value are omitted due to absence. Price et al. (2016) reported standard deviation for the Cohen’s D rather than confidence interval so standard deviation is reported in the table instead
*21/22 items were used in the current study because of a clerical error during entry of one item into the learning management system

ISSN: 1936-6434