Silhouette Stimuli (video) Cell Press Loading video... Caption Dogs visual stimuli (naturalistic and silhouette) exhibiting prevalent left- or right-asymmetric tail wagging. Stationary stimuli not wagging their tail are also showed (pictures are single frames from moving videos). Credit Current Biology, Siniscalchi et al. Usage Restrictions Credit Required 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.