Chiara Evangelista - L'accessibilità nei social network: il caso Viadeo - TesiCamp 2010


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Chiara Evangelista - L'accessibilità nei social network: il caso Viadeo - TesiCamp 2010

  1. 1. Laurea Specialistica in Editoria e Comunicazione Multimediale (ECM) THE ACCESSIBILITY OF SOCIAL NETWORKS: THE VIADEO CASERelatore:Prof. Marco PortaCorrelatore:Prof. Mario DossoniCorrelatore esterno: Tesi di laurea di:Dott. Roberto Marmo Chiara Evangelista
  2. 2. Aim of work is… To Check and Verify the accessibility of Social Networks (Viadeo in particular) by comparison with accessibility guidelines (WCAG 2.0) in a “social environment” in which are all involved , without exceptions To Spread a culture of accessibility and increase its practical application and the verification of its requirements by the developers of content To Make clear that the development of accessible resources is a gain in quantitative and qualitative terms
  3. 3. Social Network: definition“A social network is a social structure made up ofindividuals (or organizations) called "nodes“,which are tied (connected) by one or more specific typesof interdependency, such as friendship, kinship,common interest, financial exchange, dislike,sexual relationships, or relationships of beliefs,knowledge or prestige”Source:
  4. 4. Social Network: birth and development Born in 1997, remained a niche reality for some time
  5. 5. friendster.comBorn in 2003; unlike became immediately famous on the Web Started the boom of Social Networks on the Web that still does not seem to stop
  6. 6. From Social Networks to Social Media Social Network: “ […] a social structure made up of individuals (or organizations) called "nodes“ which are tied (connected) by one or more specific types of interdependency […]” (Source: Social Media: “a group of Internet-based applications that build on the ideological and technological foundations of Web 2.0, and that allow the creation and exchange of user-generated content” (Source:
  7. 7. Disability: definition“Disabilities is an umbrella term, covering impairments, activity limitations, and participation restrictions. An impairment is a problem in body function or structure; an activity limitation is a difficulty encountered by an individual in executing a task or action; while a participation restriction is a problem experienced by an individual in involvement in life situations”Source: World Health Organization – http:/
  8. 8. Disability: normative sources Italian Law n. 104/92, Legge-Quadro per l’assistenza, l’integrazione sociale e i diritti delle persone handicappate Italian Law n. 4/2004, “Disposizioni per favorire laccesso dei soggetti disabili agli strumenti informatici” c.d. Stanca Law The Madrid Declaration “Non discrimination plus positive action results in social inclusion (2002) ONU Convention on the Rights of Persons with Disabilities (2007) implemented by Italy in 2009
  9. 9. Accessibility: definition “Capability of informatic systems, in the forms and limits allowed by technological knowledges, to supply services and to provide usable information, without discriminations even by those who need assistance technologies or special configurations, owing to disabilities” * “Web accessibility means that people with disabilities can use the Web. More specifically, Web accessibility means that people with disabilities can perceive, understand, navigate, and interact with the Web, and that they can contribute to the Web” ** * Source: Italian Law n.4/2004** Source:
  10. 10. About the W3C“The World Wide Web Consortium (W3C) is an internationalcommunity where Member organizations, a full-time staff,and the public work together to develop Web standards.Led by Web inventor Tim Berners-Lee and CEO Jeffrey Jaffe,W3Cs mission is to lead the Web to its full potential”The information are taken from the Web site:
  11. 11. WCAG 2.0“Web Content Accessibility Guidelines”are the new guidelines for accessibility of Web content(official version of 2008)They represent the revised edition of the existingWCAG 1.0, written in 1999 for the same purpose
  12. 12. WCAG 2.0: structure• Principles - At the top are 4 principles that provide the foundation for Web accessibility: perceivable, operable, understandable, and robust• Guidelines - Under the principles are guidelines. The 12 guidelines provide the basic goals that authors should work toward in order to make content more accessible to users with different disabilities• Success Criteria - For each guideline, testable success criteria are provided to allow WCAG 2.0 to be used where requirements and conformance testing are necessary such as in design specification, purchasing, regulation, and contractual agreements. In order to meet the needs of different groups and different situations, three levels of conformance are defined: A (lowest), AA, and AAA (highest)
  13. 13. WCAG 2.0: an examplePrinciple 2. Operable – User interface components and navigation must be PRINCIPLE operable. - Guideline 2.1 Keyboard Accessible: Make all functionality available from a GUIDELINE keyboard.• 2.1.1 Keyboard: All functionality of the content is operable through a keyboard interface without requiring specific timings for individual keystrokes, except SUCCESS where the underlying function requires CRITERION input that depends on the path of the users movement and not just the endpoints. (Level A)
  14. 14. FacebookBorn in 2004 from an intuitionof a student of Harward,Mark Zuckerberg,is now the most popular and usedSocial Network with over 500.000.000 users- 123.000.000 in Europe- more than 13.000.000 in Italy
  15. 15. accessibility
  16. 16. (“Mobile” version)
  17. 17. LinkedIn Founded in 2003, is the Business Social Network with the largest number of users Currently has over 75.000.000 users - 15.000.000 in Europe and - 1.000.000 in Italy
  18. 18. accessibility
  19. 19. (“Mobile” version)
  20. 20. The Viadeo case Founded in 2000, is one of the most popular and used Business Social Network, second only to LinkedIn Has currently 30.000.000 members - 10.000.000 in Europe - 700.000 in Italy
  21. 21. Viadeo: study of accessibility1. Use of colors that create little contrast with the background and therefore are not suitable for low-vision or color blind people
  22. 22. 2. Too much content with not enough space between text lines
  23. 23. Also…It is not possible to:3. resize the text and change the color scheme4. display “high contrast” or “content only” versions of the pages5. vary the structure or order of the content6. obtain clear indications about mistakes (no checking and suggestions for correction)
  24. 24. Study of Viadeo accessibility: conclusions• The WCAG 2.0 Guidelines principles satisfied by Viadeo are more than those not satisfied• However, Viadeo remains partly inaccessible…• Viadeo developers are currently working to provide a full accessible version
  25. 25. Conclusions• WCAG 2.0 are available to everyone, so accessibility should be checked for any Web resource• Accessibility is currently not taken into proper consideration… as demonstrated by the inaccessibility of the two most popular Social Networks: Facebook and LinkedIn• Prejudice against the “different” is still widespread• Inaccessible sites preclude their use by a significant number of people
  26. 26. My future project is… To Continue in my personal studies and research on the subject by creating a space dedicated to them on the Web To Continue the discussion emphasizing the importance of accessibility and application of his knowledge To Propose myself as a “consultant for accessibility” for all companies that will want to understand the effectiveness and make accessible design To Develop innovative projects with major Social Networks
  27. 27. Author Chiara Evangelistamail: evangelista.chiara@alice.itViadeo: on line: