Text and Data Mining valid from 2019-01-03
Received: 24 July 2018
Revised: 17 November 2018
Accepted: 26 December 2018
First Online: 3 January 2019
Compliance with ethical standards
: BH is a founder of Dognition.com and a member of its Scientific Advisory Board. JC, JK, and ÁM are also members of the Dognition.com Scientific Advisory Board.
: Data are available as electronic supplementary material.
: All animals included in this study were pet dogs tested by citizen scientists in their own homes. The use of third-party data from Dognition.com was approved by Duke University IACUC protocol A138-11-06 and data were collected in accordance with relevant guidelines and regulations.