1. Social Media Social media is not new – Opinion pages – Telephone – Others? What is new – Fewer intermediaries – Individual ability to broadcast – Massive quantity

2. Extended CSCW Framework Different Time Same Time Different Place Email Phone, Instant Messaging, Videoconferencing Same Place Notes on the Fridge Conversation (Augmented with technology) Directed Communication (select/know your audience) Broadcast Communication (do not select/know your audience) Different Time Same Time Different Place Discussion Forums, Blogs, Podcasts, Wikis Traditional and new broadcast forms Same Place Bulletin Boards Public speaking, meeting room support

3. Intermediate Directedness Directedness is a really a continuum Many social media fall in between – Facebook friends – Twitter followers – Google+ circles Partial knowledge of audience – Meetings and public speaking forms also have some of these characteristics – These traditional forms tend to be same time, ephemeral media

4. Ephemeral Media -> Archived Media Trend for ephemeral on-line forms to become archived People’s perception is not necessarily connected to what really happens Why does this matter? – When people are being recorded (archived), they communicate differently

5. Blogs and Microblogs Are often for opinions, reports on activity, humor Personally authored Although can become linked – Microblogs can become discussions – And links between blogs can become claim/counterclaim structures

6. Why do people blog/microblog? Updating others of activities Influencing others Thinking through writing Release of emotional tension (catharsis)

7. Wikis Wikis are collaboratively authored resources Are often used for (fairly) objective content – User manuals – Wikipedia – Fan / player sites Include facilities for collaboration – Talk pages – History pages

8. Building on Social Media Mining and automatic interpretation – Information retrieval techniques – Language-aware techniques Personalizing – Information Filtering (Infoscope) Information Visualization – Content – Temporal Change – Connections

10. Reminder of Last Class CSCW framework related to place, time and directedness of communication – Many social media fall in between directed and not Ephemeral -> Archived Media Blogs Wikis Information Filtering Now we continue with visualization

11. Visualizing a Collection of Texts

12. Visualizing Time and Content

14. Visualizing Connections

18. History Flow Visualization of Wiki Edits

20. Textual Social Media A wide variety supporting different categories of communication Web 2.0 social media enable new roles based on scale and controls Mining and visualization support access and create new (meta-)media forms