Table 2. Summary of Meiosis Concept Inventory (MCI) pre- and post-assessment item means across both sections.
MCI ItemConcept AddressedBloom's LevelPre Score AveragePost Score Averaget Ratiopdf
1PloidyII0.500.312.749550.0074**81
2Ploidy, what “counts” as a chromosomeIII0.160.332.993220.0037**81
4PloidyIII0.040.050.375980.707981
13Changes in the amount of DNA in a cell in relation to timing of events in meiosisII0.290.350.8969560.372481
14Timing of events in the cell cycle and meiosis in relation to chromosomes/chromatidsI0.420.593.0939820.0027**81
15Timing of events (segregation of sister chromatids); consequences of crossing overII0.330.491.8342770.070381
16Timing of events (segregation of sister chromatids); consequences of crossing overII0.230.707.024216<0.0001***81
17Gamete formation, segregation of alleles and chromosomesIV0.3410.6284.135866<0.0001***81

Notes: A single asterisk (*) indicates significance at the p < 0.05 level, two asterisks (**) indicate significance at the p < 0.01 level, three asterisks (***) indicate significance at the p < 0.001 level. Concept(s) addressed and Bloom's level as reported in Kalas et al. (2013).