1. Crowdsourcing & Social Networks Shrenik Sadalgi Spring 2010 COMS E6125 Web-enHanced Information Management Columbia University

2. Introduction “ Crowdsourcing is a neologistic compound of Crowd and Outsourcing for the act of taking tasks traditionally performed by an employee or contractor, and outsourcing them to a group of people or community, through an "open call" to a large group of people (a crowd) asking for contributions” -Wikipedia

3. Examples of Crowdsourcing

5. Problem Owner Me Problem Writing the paper Tasks Creating content for a section of the paper Participants Friends / Random People Solution Writing a sub-section of the paper Incentive Authorship Crowdsourcing my WHIM paper / presentation content

6. Architectures of Crowdsourcing One Problem Multiple ParticipantsMultiple Tasks Multiple Participants

7. Web 2.0 and the Rise of Crowdsourcing http://whitehallplc.files.wordpress.com/2009/01/screen-capture-1.jpg

8. Web 2.0 and the Rise of Crowdsourcing Architectures of Participation

9. Web 2.0 and the Rise of Crowdsourcing User Generated Content

10. AJAX and the emergence of Web Services Web 2.0 and the Rise of Crowdsourcing

11. Acting independently, but collectively Web 2.0 and the Rise of Crowdsourcing

12. Acts as a destination hub for individuals to establish relationships with co-workers and by doing so, enable them to jointly build, or expand, their professional and social networks Includes different tools for people to interact with each other, contribute information to the site, participate in different site activities, and build a sense of community in an informal and voluntary manner Crowdsourcing & Social Networks CrowdsourcingSocial Networks Acts as a destination hub for individuals seeking to either add value or earn some money A tool for solving the problem and collecting the solution from the participants if the problem is solvable online in a short period of time (in the order of minutes) Need not have any tools for participants to interact with each other and collaborate

13. iOu Crowdsourcing over Social Networks Problem Owner – Borrower (User) Problem – Financing $100 Tasks – Financing $1 Participants – Friends and Friends of Friends of Borrower (User) Solution – Lending $1 to the Borrower Incentive – None for small amounts (feel good factor) / Payback with or without Interest / Services / Return of favor someday Problem Owner – Answer Seeker (User) Problem – Question Participants – 1st, 2nd,3rd Nth degree of contacts of the answer seeker (User) Solution – Answer to question Incentive – Return of favor someday (someone will answer a question asked by an answer provider) Ask

14. iOu API Support Retrieve the social graph of a user (List of first degree contacts (friends), second degree contacts (friends of friends), Nth degree contacts) friends.get - Returns the identifiers for the current user's Facebook friends Send and receive messages between users None – Only communication through wall posts, comments & events Retrieve the social graph of a user (List of first degree contacts (friends), second degree contacts (friends of friends), Nth degree contacts) followers/ids - Returns an array of numeric IDs for every user following the specified user Send and receive messages between users direct_messages/new - Sends a new direct message to the specified user from the authenticating user search - Returns tweets that match a specified query Ask

15. Identifying Experts Social Interaction / Collaboration Quality control Scalability Trusting the Crowd – Wisdom of the Crowd Advantages of Crowdsourcing over Social Networks

16. Thank You