. Author manuscript; available in PMC: 2018 Nov 27.
Published in final edited form as: Nat Hum Behav. 2017 Dec 18;2(2):156–164. doi: 10.1038/s41562-017-0260-9
Users may view, print, copy, and download text and data-mine the content in such documents, for the purposes of academic research, subject always to the full Conditions of use: http://www.nature.com/authors/editorial_policies/license.html#terms