About the Authors
- Catrin Rode
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* E-mail: crode@uoregon.edu
Affiliation Department of Psychology, University of Oregon, Eugene, Oregon, United States of America
- Robby Robson
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Affiliation Eduworks, Corvallis, Oregon, United States of America
- Andy Purviance
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Affiliation Eduworks, Corvallis, Oregon, United States of America
- David C. Geary
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Affiliation Psychological Sciences, University of Missouri, Columbia, Missouri, United States of America
- Ulrich Mayr
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Affiliation Department of Psychology, University of Oregon, Eugene, Oregon, United States of America
Competing Interests
RR & AP are employees of Eduworks. There are no patents, products in development or marketed products to declare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.
Author Contributions
Conceived and designed the experiments: CR RR UM. Performed the experiments: CR. Analyzed the data: UM. Contributed reagents/materials/analysis tools: CR UM RR AP DG. Wrote the paper: CR UM DG.