Video Used for the Study (video) Hokkaido University Share Print E-Mail Loading video... Caption These are examples of computer-generated figures nodding or shaking their heads. Credit Hokkaido University Usage Restrictions This video is copyrighted and can be used for reporting this press release if properly credited. Share Print E-Mail 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.