About the Authors

Pau Sunyer

Contributed equally to this work with: Pau Sunyer, Alberto Muñoz, Josep Maria Espelta

p.sunyer@creaf.uab.cat

Affiliation CREAF, Cerdanyola del Vallès, Catalonia, Spain

Ester Boixadera

Affiliation Servei d’Estadística Aplicada, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Catalonia, Spain

Alberto Muñoz

Contributed equally to this work with: Pau Sunyer, Alberto Muñoz, Josep Maria Espelta

Affiliations CREAF, Cerdanyola del Vallès, Catalonia, Spain, Departamento de Didáctica de las Ciencias Experimentales, Facultad de Educación, Universidad Complutense de Madrid, Madrid, Spain

Raúl Bonal

Affiliations CREAF, Cerdanyola del Vallès, Catalonia, Spain, Forest Research Group (GIF) INDEHESA, University of Extremadura, Plasencia, Spain, DITEG Research Group, University of Castilla-La Mancha, Toledo, Spain

Josep Maria Espelta

Contributed equally to this work with: Pau Sunyer, Alberto Muñoz, Josep Maria Espelta

Affiliation CREAF, Cerdanyola del Vallès, Catalonia, Spain

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AM RB JME. Performed the experiments: PS AM RB JME. Analyzed the data: PS EB. Wrote the paper: PS AM JME.