Developed at UC Berkeley, "Opinion Space" (also known as The Collective Discovery Engine) is a social media technology designed to help communities generate and exchange ideas about important issues and policies.
[1] Version 1.0 was launched on April 4, 2009, at UC Berkeley, and explored the question "Do you think legalizing marijuana is a good idea?"
Then U.S. Secretary of State Hillary Rodham Clinton explained, "Opinion Space will harness the power of connection technologies to provide a unique forum for international dialogue.
The website uses data visualization and statistical analysis to present and develop public opinion and ideas.
The system uses a game model that incorporates techniques from deliberative polling, collaborative filtering, and multidimensional visualization.