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Table 4 Occurrence of key concepts in student responses to three short-answer questions in post-lab assignment

From: Testing the effectiveness of two natural selection simulations in the context of a large-enrollment undergraduate laboratory class

Key concept

# of items

Frequency

Physical

Virtual

Variation in trait

2

0.69

0.64

Differential survival/reproduction

2

0.64

0.60

Heritability of trait

2

0.44

0.45

Mutation as source of variation

1

0.19

0.29

Randomness of mutation

1

0.11

0.09

Genetic drift

1

0.04

0.06

  1. Some concepts appeared in responses to more than one item. There were no significant differences between treatments in the frequencies of any of the concepts (χ2 tests, all p > 0.1)