Visual Discrimination of Species in Dogs (image) Springer Caption These images show: a: Apparatus. b: The dog sits in front of the experimenter, on a line between two screens. c: When hearing an order, the dog expressed his choice by going to a given screen and putting his paw in front of the chosen image. Credit Dominique Autier-Dérian / Animal Cognition Usage Restrictions None 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.