Overview of the self-organized hierarchy (IMAGE) Intelligent Computing Caption (a) The roles of robots in the collective perception task according to their hierarchy level. (b) Reactive sweeping motions. Credit ARYO JAMSHIDPEY ET AL. Usage Restrictions Credit must be given to the creator. License CC BY 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.