We regret to report that Ref. 4 from our recent article is cited incorrectly. The correct reference is Hake, R.R., “Relationship of Individual Student Normalized Learning Gains in Mechanics with Gender, High-School Physics, and Pretest Scores on Mathematics and Spatial Visualization” (2002), available online at ⟨http://www.physics.indiana.edu/∼hake/PERC2002h.Hake.pdf⟩.

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