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Table 5 Results of POLR analysis of students’ responses to versions C and D

From: Freshman Undergraduate Biology Students’ Difficulties with the Concept of Common Ancestry

Factor Coefficient P value
One level increase in taxonomic difference −0.61 <10−16
Humans included in question −0.21 0.020
Defined common ancestor −0.25 0.0006
  1. The coefficient is the natural logarithm of the change in the odds ratio resulting from a change in the corresponding factor