‘Who’s a good boy?’ Humans use dog-specific voices for better canine comprehension (IMAGE) PLOS Caption man talking to his dog. Credit Pixabay, Pexels (CC0, https://creativecommons.org/public-domain/cc0/) Usage Restrictions No restrictions. License CC0 Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.