About the Authors

Esther Kaufmann

esther.kaufmann@gmx.ch

Affiliation Institute of Education, University of Zurich, Zurich, Switzerland

Werner W. Wittmann

Affiliation Otto-Selz Institute for Applied Psychology, University of Mannheim, Mannheim, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: EK WWW. Analyzed the data: EK WWW. Contributed reagents/materials/analysis tools: EK WWW. Wrote the paper: EK WWW. Literature search: EK WWW.