About the Authors

Martin Oscarsson

Roles Formal analysis, Project administration, Validation, Writing – original draft, Writing – review & editing

Affiliation Department of Psychology, Stockholm University, Stockholm, Sweden

Per Carlbring

Roles Conceptualization, Funding acquisition, Methodology, Supervision, Validation, Writing – review & editing

per.carlbring@psychology.su.se

Affiliation Department of Psychology, Stockholm University, Stockholm, Sweden

Gerhard Andersson

Roles Resources, Writing – review & editing

Affiliations Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet, Sweden, Department of Behavioral Sciences and Learning, Linköping University, Linköping, Sweden

Alexander Rozental

Roles Conceptualization, Supervision, Writing – review & editing

Affiliations Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet, Sweden, UCL Great Ormond Street Institute of Child Health, London, United Kingdom

Competing Interests

M. Oscarsson, P. Carlbring and A. Rozental receive royalties for a book on New Year’s resolutions, in part based on the current study. This does not alter our adherence to PLOS ONE policies on sharing data and materials. G Andersson has declared that no competing interests exist.