About the Authors

Saul Shiffman

shiffman@pitt.edu

Affiliation Department of Psychology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America

Michael S. Dunbar

Affiliation Department of Psychology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America

Xiaoxue Li

Affiliation Department of Biostatistics, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America

Sarah M. Scholl

Affiliation Department of Psychology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America

Hilary A. Tindle

Affiliation Division of General Internal Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America

Stewart J. Anderson

Affiliation Department of Biostatistics, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America

Stuart G. Ferguson

Affiliation School of Medicine, University of Tasmania, Hobart, Tasmania, Australia

Competing Interests

The authors have read the journal's policy and have the following conflicts: SS consults to and has an interest in eRT, inc, which provides electronic diaries for research. This interest does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: SS SGF. Performed the experiments: SS SGF MSD SMS. Analyzed the data: SS MSD XL SJA. Contributed reagents/materials/analysis tools: SS MSD XL SMS HAT SJA SGF. Wrote the paper: SS.