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Alice Krueger Virtual Ability, Inc. akrueger@virtualability.org © 2010
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Textbooks Analyzed. Types of Issues Noted. Website Structural Accessibility. PDF Accessibility. Common Issues (both formats). Positive Findings. Conclusion.
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60 Open Textbooks Analyzed Selected from more commonly taught intro topics. 35 websites (58%). 25 downloadable PDFs (42%). Including selections from five collections: Connexions. Flat World Knowledge. MediaWiki. Open Learn. Open Learning Initiative.
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Textbook Accessibility Textbooks available as websites or PDFs must be: Perceivable, Operable, Understandable, and Robust.
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Types of Issues Noted Website Structural Accessibility. Due to pre-set formats. Other issues. PDF Accessibility. Common Issues (both formats). Positive Findings.
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Issues of Website Structural Accessibility Pre-Set Formats (5 collection sites): Structural markup, e.g. nesting headers, data table title and summary attributes, fixed width (100%). Color contrast (80%). In-page navigation (40%).
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Issues of Website Structural Accessibility Author-created Website Structural Problems: Structural semantic organizers (26% headers, 3% bulleted lists). Tables (31% headings, 40% table attributes). Fixed width page (14%). In-page navigation (14%).
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(cont.) Data entry using Flash (9%). Reliance on Java scripts (6%). Non-mouse operation (9%). Frames (3%).
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Issues of PDF Accessibility PDFs download from a website: If there is a problem with the website that houses the PDF, even an accessible PDF is inaccessible. PDF accessibility features, unavailable in 100% of PDFs examined, including: Tagging and reading order. Searchable text. Fonts allow character extraction to text.
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(cont.) Interactive form fields. Non-mouse navigational aids. Specified document or text block language. No security restrictions against AT. Proper tagging and reading order. Alt text.
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Common Issues in Both Formats Visual Appearance: Dense text (17% web, 32% PDF). Small font (3% web, 20% PDF). Visual clutter (14% web, 12% PDF). Specific issues with mathematical symbols.
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(cont.) Content Organization: Important/less important (14% web, 20% PDF). Organizational flow (14% web, 4% PDF). Lack Table of Contents (12% PDF, plus other issues). Lengthy pages (23% web, 4% PDF).
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(cont.) Content-related Vocabulary: Inconsistent emphasis (9% web, 28% PDF). Need Glossary (54% web, 44% PDF). Author’s Voice (11% web, 12% PDF). Consistency: Visual format (17% web, 28% PDF). Reading ease (26% web, 44% PDF).
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(cont.) Need Alternatives: Alt text (63% web, 100% PDF, plus additional issues). Color coding (14% web, 12% PDF). Comprehension Level (37% web, 36% PDF).
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Positive Findings Five percent of website evaluations and 8% of PDF evaluations were deemed exemplary. Appropriate readability level (3 PDFs). Visual-semantic organization (2 PDFs). Format consistency (2 PDFs). Presentation style (1 website, 2 PDFs). Lack of clutter (1 PDF). Glossary (1 PDF).
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CONCLUSION: How to Build In Accessibility? Authors need: Awareness, How-To Knowledge, Professional Assistance, and Incentives.
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Selected References Abedi, J., Hofstetter, C., Baker, E., & Lord, C. (2001, February). NAEP Math Performance and Test Accommodations: Interactions with student language background. CSE Technical Report 536. Adobe. (2008). Adobe® Acrobat® 9 Pro Accessibility Guide: Best Practices for Accessibility. Retrieved July 14, 2010, from http://www.adobe.com/accessibility/best_practices.ht l Bailey, T. (2009, February). “Rethinking Developmental Education in Community College.” CCRC Brief, Number 40.
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(cont.) Grabinger, S. R., Aplin, C., & Ponnappa-Brenner, G. (2008, February). Supporting learners with cognitive impairments in online environments. TechTrends, 52(1), 63-69. Lighthouse International. (2010). Making Text Legible. Retrieved July 4, 2010, from http://www.lighthouse.org/accessibility/design/access ible-print-design/making-text-legible US Government. (2010). Resources for understanding and implementing Section 508. Retrieved Oct. 15, 2010 from http://www.section508.gov/
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(cont.) W3C. (2010). WAI guidelines and techniques. Retrieved Oct. 15, 2010 from http://www.w3c.org/WAI/guid- tech.html WebAIM. (2010). Cognitive Disabilities: Introduction. Retrieved July 14, 2010 from http://webaim.org/articles/cognitive/
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