Tag Clouds And Learning


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Advances in authoring tools and improved access to distributed content sources using technologies like Web Services, provide a sea of valuable learning content to learners. However, without better navigation tools, learners will simply drown in this ever-changing sea of information. Tag clouds offer a powerful new approach for navigating eLearning content, especially rapidly evolving content. Rather than having to search for content, Tag clouds allow learners to see popular content and subscribe to content of interest using simple tags. Tag clouds also help content producers classify content using the collective intelligence of their organization. Moreover, the Tag-based classification system improves as more content is published and tagged.

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  • Tag Clouds And Learning

    1. 1. Tag Clouds and Learning Timothy Potter Xerceo, Inc.
    2. 2. Example Cloud
    3. 3. My Story <ul><li>FUD: </li></ul><ul><ul><li>Which category does this course belong in? </li></ul></ul><ul><ul><li>The training exists … did the right users know about it? </li></ul></ul><ul><li>~18 months ago, I wrote my first tag framework for an enterprise LMS. Recently completed 2 nd generation tag framework … </li></ul>
    4. 4. Motivation?
    5. 5. Typical LMS Navigation Tools
    6. 6. Tag Cloud to the Rescue?
    7. 7. Tag Cloud Properties Font size & color indicates popularity Popularity has several dimensions - Number of Tagged Objects (all time vs. timespan) - Number of clicks on a tag (hot topic) Tip: You can have your own weighting criteria!
    8. 8. Other ways to Sort a Tag Cloud <ul><li>By Popularity </li></ul>By Facet
    9. 9. Tag Cloud Navigation Each Tag in the Cloud is a Link
    10. 10. Tag Cloud Navigation Click on a tag and the cloud “pivots” around the selected tag … only tags that occur with the pivot are shown.
    11. 11. Tag Cloud Navigation
    12. 12. Benefits <ul><li>Can see synopsis of concepts; keywords </li></ul><ul><li>Can see related stuff, can just browse the catalog, random walk through </li></ul><ul><li>Don't have to think what to type into the search field </li></ul><ul><li>Less rigid (and less work to maintain) than a hierarchy of categories </li></ul>
    13. 13. Relevance based Sorting <ul><li>No benefit if clicking a tag just shows 1,000’s objects that you have to wade through … </li></ul><ul><li>Relevance Score : Who you are and what you are doing ... </li></ul>
    14. 14. Relevance based Sorting
    15. 15. Applications beyond Nav <ul><li>Recommend content based on tag subscription </li></ul><ul><li>Find the best category in a catalog for new content – threaded discussions </li></ul>
    16. 16. Complements the Search Engine <ul><li>Improve search engine results because natural language is attached to objects </li></ul>
    17. 17. Common Problems
    18. 18. Solutions to Common Problems <ul><li>Solutions to common problems </li></ul><ul><li>Solve the tag weight issue with linear scaling using logarithms </li></ul><ul><li>Solve the synonym problem using in-house database or WordNet </li></ul><ul><li>Solve the stems issue using Porter Stemmer </li></ul><ul><li>Solve the mixed language issue using per language tag clouds </li></ul><ul><li>Mis-spellings … be able replace all uses of a tag with another … also good for M&A </li></ul>
    19. 19. Personalized tag cloud
    20. 20. Personalized tag cloud <ul><li>Interests … e.g. My Tag Subscriptions </li></ul><ul><li>Favorites </li></ul><ul><li>Tags I use frequently </li></ul><ul><li>Other users like me … Your LMS should have a good idea about this! </li></ul>
    21. 21. Tag Data Model <ul><li>Display Text </li></ul><ul><li>Language </li></ul><ul><li>Stem </li></ul><ul><li>Created by </li></ul><ul><li>Created on </li></ul><ul><li>Known synonyms (0 to many) </li></ul><ul><li>References to objects (by who? And when?) </li></ul><ul><li>Subscribers </li></ul>
    22. 22. How do tags get created?
    23. 23. Goal: End User Tagging <ul><li>When does a tag become useful to others? Let software do the heavy lifting …. folksonomy </li></ul>
    24. 24. End User Tagging in Action
    25. 25. Last Remarks / Advice <ul><li>Phased approach … roll out end user tagging slowly … start with subject matter experts </li></ul><ul><li>Be creative … don’t just copy what you see on the Web … </li></ul>
    26. 26. Questions? <ul><li>Hands on at our table - Xerceo </li></ul><ul><li>Email me – [email_address] </li></ul>