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Table 1 Results of POLR analysis of students’ responses to versions A and B

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

Factor Coefficient P value
One level increase in taxonomic difference −0.50 <10−16
Question order (changing from low-to-high to high-to-low) 0.21 6.26 × 10−9
  1. The coefficient is the natural logarithm of the change in the odds ratio resulting from a change in the corresponding factor