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A Guide for Assuring Equal Access For People with Disabilities PDF Version
This publication was developed by the Oklahoma ABLE Tech Program for Assistive Technology, which supports people with disabilities who require assistive technology devices and services. Oklahoma ABLE Tech: Linda Jaco, Project Manager Oklahoma State University Seretean Wellness Center 1514 W. Hall of Fame Stillwater, OK 74078 1-800-257-1705 Voice/TTY 405-744-2487 (Fax) http://okabletech.okstate.edu
Oklahoma ABLE Tech would like to thank the Disability Law Resource Project, Region IV, in Houston, TX for funding this publication, NIDRR Grant No. H133D010210. Oklahoma ABLE Tech would also like to acknowledge the following groups for their development of much of the information in this booklet: the Missouri and North Dakota Assistive Technology Projects, the WebAIM Project at Utah State University, and the DO-IT Project, University of Washington.
ABLE Tech is funded by the National Institute on Disability and Rehabilitation Research of the U.S. Department of Education, Grant #H224A50007. The contents of this site were developed under a grant from the Department of Education. However the contents do not necessarily represent the policy of the Department of Education, and you should not assume endorsement by the Federal government.
Letter from Oklahoma ABLE Tech, OSU Seretean Wellness Center, 1514 W. Hall of Fame, Stillwater, OK 74078-2026
Oklahoma ABLE Tech is pleased to share with you a copy of the Information Technology Accessibility: a Guide for Assuring Equal Access for People with Disabilities. This publication provides recommendations to assist entities with ensuring their Information Technology is accessible to people with disabilities. The basic reason for exclusion of individuals with disabilities from the digital environment is inaccessibility of the information technology product, such as websites or automated phone systems. In general, an information technology system is accessible to people with disabilities if it can be accessed in a variety of ways that do not depend on a single sense or ability, and/or is compatible with add-on adaptive devices that allow for alternative input and output.
Examples of barriers that can exclude people from information technology may include: an individual with a visual impairment who uses a screen reader to navigate the Web will most often find Web pages inaccessible when the graphics or pictures are not labeled with alternative text information; an employee may find the office software incompatible with his/her computer access device; or, a person calling a voice automated system may find the system inaccessible when using an alternative phone.
Please use this guide for assistance when purchasing technology and share it with others who might find it useful. Let's not let the very technology that has the potential to close the educational, employment, and independent living gaps for individuals with disabilities, create an even larger divide. Copies of this booklet are available in a variety of formats and may be ordered by calling 1-800-257-1705. The booklet is also available on our website at http://okabletech.okstate.edu
Sincerely, Linda Jaco, Program Manager and Brenda Unruh Dawes, Marketing and Web Manager
Information Technology Accessibility: A Guide for Assuring Equal Access for People with Disabilities
2) Computer Data and Sound - The following basic assistive technology ensures effective communication with computer input and output for individuals with disabilities:
19"-21" Large Monitor with Moveable Mounting Arm - Individuals with low-vision will benefit from a larger monitor. It provides for increased character size in proportion to monitor dimensions and provides a crisper, sharper image. The moveable mounting arm allows the user to position the screen where needed.
Screen Enlargement Software - This software is effective for persons with low-vision and can be paired with a 19"-21" monitor. It allows for enlargement of print on the monitor's screen, enabling the user to review a document with the text magnified to a comfortable size and with the colors of the screen adjusted for best contrast. The user can use any part of the screen by scrolling up, down, or across.
Speech Synthesizer and Screen Reading Software - These are effective for persons with visual disabilities and reading limitations (e.g., persons with learning disabilities in print decoding and reading comprehension). The hardware component of the speech access system, the speech synthesizer, can be a portable, external device or an internal circuit board. The screen reading program "instructs" the synthesizer. Screen reading software allows users to access commercial software applications by converting text or graphics display with text descriptions to verbal output.
Flatbed Scanner - The use of a scanner is effective for persons with all types of disabilities who need information in digital rather than print form. The scanner is an add-on to the computer that converts an image from a printed page to a computer file with the use of optical character recognition (OCR) software.
Trackball - Trackballs are an alternative to the mouse for individuals who have difficulty maneuvering a mouse due to limited motor skills. A trackball is essentially an upside down mouse, with a moveable ball on top of a stationary base. The ball can be rotated with a pointing device, hand, or forearm.
Alternative Keyboard - An alternative keyboard is a modified version of the standard keyboard supporting key selection based upon the user's unique needs. Consumers who might benefit from an alternative keyboard may include: one-handed typists; those with limited use of their hands; those with limited gross or fine motor skills; those in need of a different keyboard layout; and, those who fatigue easily.
Word Prediction Software - Word prediction software enables the user to reduce the number of keystrokes used in typing by the selection of a desired word from an on-screen list or prediction window. This computer-generated list predicts words from the first one or two letters typed by the user. The word may then be selected from the list and inserted into the text. Individuals with physical or learning disabilities may benefit from this software.
Large Keyboard Caps and Keyboard Orientation Aids - These key markings assist low-vision users by enlarging letters and numbers on the keyboard. Many keyboards already have a raised dot or other tactile marker on the home row keys to give orientation.
Height Adjustable Table - Conventional tables are often not functional for people using wheelchairs or people of short stature. Height adjustable tables allow for adaptation to more comfortable height levels for computer use and other tasks.
If assistive technology, beyond these basic devices, is needed to provide access to computer sound and data, the entity should secure such assistive technology or provide an alternative method of access.
3) Print Materials - The following assistive technology shall provide effective communication with print materials:
Tape Recorder - A tape recorder can be used to record print information for consumers who have visual disabilities or reading disabilities so they can listen to the information instead of reading.
Speech Synthesizer, Screen Reading Software, and Flatbed Scanner - These are effective for persons with visual disabilities and reading limitations. The hardware component of the speech access system, the speech synthesizer, can be a portable, external device or an internal circuit board. The screen reading program "instructs" the synthesizer. Screen reading software allows users to access commercial software applications by converting text or graphics display with text descriptions to verbal output. Printed materials are scanned and converted from a printed page to a computer file and read aloud.
Electronic Enlarging - The magnification of print material by a closed circuit television system allows low-vision users to read a full range of print material. Electronic enlarging devices should have stationary beds for material placement (rather than hand-held cameras) and a 14-inch display monitor.
In providing print access, entities should be able to produce all materials in a full range of alternative formats. Materials can be made available in disk, Braille, large print, and audio, and produced by internal staff or by securing the services of external resources. Entities should establish procedures, which are timely for consumers to receive the requested alternative format.
4) Aurally Communicated Information - Entities can provide effective communication with auditory information via the following assistive technology:
Portable Assistive Listening Device - Assistive listening devices are often used by individuals who have mild to severe hearing losses. The main function of an assistive listening device is to increase the loudness of specific sounds (in most cases, the speaker) while also reducing background noise, allowing increased understanding of speech.
Captioning Display - Captioning display devices allow for viewing of text captions that correspond to the speech in videotapes and similar media. Caption decoders, or built-in decoding chips in the video display equipment, provide access to the text if the media has captioning.
In providing alternative methods of oral communication access, each entity should be able to furnish a full range of communication options (sign language interpreters, certified at the intermediate level or above, real-time captioners, assistive listening devices). Entities need to establish procedures and time-lines for consumers to request oral communication options they need to participate. Delivery of both interpreter and real-time captioning services will likely involve contracting with external providers. [Reminder: requests for auxiliary aids and services are the responsibility of the consumer.] Computer Assisted Real-Time (CART) captioning is provided by a "real-time" trained court stenographer with specialized equipment that allows for immediate transcription of steno-code into readable text. Attention should be given to the type of language interpreting needed by the consumer (e.g., American Sign Language, Manually Coded English, oral interpreting, etc.).
5) Accessible Web Design - The World Wide Web has rapidly become the most popular Internet resource, combining hypertext and multimedia to provide a huge network of educational, governmental, and commercial resources. Yet, because of the multimedia nature of the medium, many Internet users cannot access some of these materials. Some users:
How People with Disabilities Use the Internet
There are five disability categories that affect Internet usage: vision, hearing, motor, cognitive and a composite miscellaneous category including seizure disorders and age-related processes. Solutions for disability access must look at the experiences of ALL people. This overview of Web accessibility will take a look at each one of these disability types individually.
Vision Impairments: Blindness, Low-Vision, Color-blindness
Web Challenges for those who are Blind and How to Address those Challenges
Challenges of interface and navigation with blindness:
Low-Vision Facts -Approximately 9.2 million individuals (3.5 percent of the population) have low-vision.
Web Challenges for those with Low-Vision and How to Address those Challenges
Challenges of interface and navigation with low-vision:
Web Challenges for those who are Color-Blind and How to Address those Challenges
Challenges of interface and navigation with color-blindness:
Hearing Impairments: Deafness
Facts -There are approximately 120 million people worldwide with a disabling hearing limitation. -Approximately 22 million Americans (8.2%) report some level of hearing loss. -2.4 million of these have severe hearing loss.
Web Challenges for those who are Deaf and How to Address those Challenges
In addition, even if these technological barriers were overcome, the person in the video would have to continually face the camera and clearly enunciate each word visually. This is impractical in nearly all cases. Perhaps the greatest barrier to the idea of reading lips over the Web is the fact that not all people who are deaf have learned how to read lips. The use of sign language over the Web is a possibility, but it meets with some of the same problems: small video size, poor resolution, and the fact that not all deaf people use sign language. Sign language may certainly be used in some circumstances, but it is often more appropriate in addition to captions or transcripts, rather than in the place of such text-based alternatives.
Challenges of interface and navigation with deafness:
Deaf-Blindness Facts -More than 10,000 children alone are deaf-blind.
Web Challenges for those who are Deaf-Blind and How to Address those Challenges
Facts - The number of people worldwide with a disabling motor limitation is approximately 120 million. -In the United States, those with spinal cord injuries are between 150,000 and175, 000, with an increase of 7,000-8,000 a year. -Approximately 500,000 Americans are affected by Multiple Sclerosis. -Between 500,000 - 700,000 Americans have some degree of Cerebral Palsy; approximately 15,000 babies each year are born with Cerebral Palsy with another 500 developing it in early life.
Web Challenges for those with Motor Impairments and How to Address those Challenges
These devices emulate the functionality of the standard keyboard, to one degree or another, so keyboard access to websites is paramount. If a mouse is required to access a certain link or function, that Web page is inaccessible to these individuals. Because of the extra physical effort that some individuals with mobility impairments must put forth, they may become fatigued quickly. Individuals using a head wand, for example, may tire of making the necessary head movements to press the tab key to navigate from link to link. This is especially true when long lists of links - such as a site's main navigational links - precede the main content of a page. The individual must make the same repetitive head movement 10, 20, or 30 times before arriving at the desired link. One way to avoid causing this kind of fatigue is to provide a way for the end-user to skip over long lists of links.
Challenges of interface and navigation with motor impairments:
Web Challenges for those with Cognitive Impairments and How to Address those Challenges
It is important here to address an apparent conflict between the needs of individuals with visual impairments (who benefit from text rather than graphics) and those with cognitive impairments (who benefit from graphics and icons). There is no need to interpret these needs as mutually exclusive. Those using screen readers are not harmed by the use of images, as long as alternative text is provided. Those with cognitive disabilities will not be harmed by the presence of the alternative text supplied for images. It is possible, and desirable, to create Web pages that cater to both of these audiences, without alienating non-disabled audiences.
Challenges of interface and navigation with cognitive impairments:
Miscellaneous Category of Disabilities - Seizure disorders and Age-related disorders
Facts -Approximately 2 million Americans have a seizure disorder.
Seizure Disorders Accommodating people with seizure disorders is one of the easiest of all Web accessibility tasks. There is only one consideration: do not create pages that flicker at a rate that is likely to cause seizures. This rate has been defined at 2 Hz to 55 Hz. Some banner ads, designed to grab the attention of prospective customers, flash or flicker at rates that may indeed induce seizures in those susceptible to those with photoepilepsy. The solution is simple: don't do it!
Age-related Processes Another population experiencing difficulties with the Web are those with age-related disabilities. These are those who have restrictions caused by age. Typically they are a blend of the loss of vision, hearing and motor skills. Attending to the information presented earlier will take care of the needs of the elderly. If we do this now, accessible sites will be standard when we are old and frail.
6) Techniques for Accessible Web Design - Whether you are just beginning with Web page creation or are experienced in HTML, you will gain a greater understanding of how to create accessible HTML content. These guidelines can be incorporated with editing tools such as FrontPage and Dreamweaver as well as with courseware such as WebCT and Blackboard.
Follow these easy guidelines when developing and revising your Web pages to ensure that they are accessible to a diverse audience. The tutorial is based on the W3C, Web Accessibility Initiative guidelines and Section 508 standards for Web content. You may refer to the exact Web standards written to comply with Section 508 of the Rehabilitation Act at http://www.access-board.gov/sec508/guide/1194.22.htm
General Page Design
- Maintain a simple, consistent page layout throughout your site. A consistent design and look makes it easier for visitors to locate the specific information they seek. For example, a feature presented on every page, such as a standard navigation menu or logo for the site should always appear in the same place. A carefully planned organizational scheme will help everyone use your site. A clear, consistent presentation will especially assist people with visual impairments or learning disabilities who have difficulty following disorganized presentations.
- Keep backgrounds simple. Make sure there is enough color contrast. People with low-vision or color-blindness, or those using black and white monitors, can have difficulty reading information at sites with busy backgrounds and dark colors. Some background images and colors obscure text and make reading difficult. Make sure that there is enough contrast between your text and the background of the page. Choose background, text and link colors carefully, and always test your site by viewing it at different resolutions and color depths. For example, you can change your monitor settings to a resolution of 640x480 and 16 colors for one test, and change to 1024x768 and 24 bit color for another.
- Use standard HTML. Hypertext Markup Language (HTML) is the standard code used to create websites. HTML was designed to be a universal format outside the bounds of proprietary software and computer operating systems. The code works via tags that tell a Web browser where to find and how to display information. While nonstandard tags exist, using standard HTML as defined by the W3C will ensure that your content can be accessed by all browsers used by visitors to your site. Avoid tags, features and plug-ins that are available to only one brand or version of a browser.
- Design large buttons. Small buttons marking links can be difficult targets for visitors with mobility impairments that result in restricted hand movements. Larger buttons can make it easier for all visitors to select the links on your page. Test how your buttons appear and operate with a variety of monitor sizes and screen resolutions.
- Caption video and transcribe other audio. Multimedia formats that include audio can present barriers to people with hearing impairments as well as to people with less sophisticated computer systems. Provide captions and transcriptions for these resources so visitors who cannot hear have an alternative method for accessing the information.
-Make links descriptive so that they are understood out of context. Visitors who use screen reading software can adjust their software to read only the links on a page. For this reason, links should provide enough information when read out of context. Use a more descriptive phrase than "click here" as a link or next to a graphic used as a link. For example, read the following HTML code surrounding the link:
Click here for information about our company.
will present "Click here" as the link (you don't want to do this). However, will display "Information about our company." as the link text, (which is a good, descriptive link).
However, When a sighted visitor views the page with a graphical browser, he will see a picture of the Oklahoma ABLE Tech logo. When someone who is blind visits, his voice output program will read [ABLE Tech logo]. This gives him a clear idea of what is on the page. In addition, any visitor coming to the site using a text-based browser will understand that there is an ABLE Tech logo there instead of the more ambiguous "image," the default result when no ALT attribute is used. ALT attributes should be short (less than 5 words) since browsers sometimes have difficulty displaying lengthy ALT text. On a Web page, the ALT text pops up when the cursor is placed on it.
A WYSIWG editing tool such as FrontPage and Dreamweaver have property windows that also allow you to type in the ALT Text in a box. This information can be found in the editing tool help guide or manual.
When using text to describe complex graphs or charts, or to transcribe sound files containing speech or lyrics, summarize the information next to the element, or consider using the LONGDESC attribute, which provides for more detailed text than ALT. Lengthy descriptions can also be linked to an external document or immediately follow the graphic or sound element by using the letter "D" to link to another document that contains the lengthy description. "
Include menu alternatives for image maps to ensure that the embedded links are accessible. In an image map (also called ISMAP), a part of a picture can be clicked to activate a link to another page. For example, on a map of the United States, a visitor might click on an image of the State of Oklahoma to find information about the state. If the Web page developer has not included an alternative menu, visitors using text-based browsers can be totally blocked from the site, or sent on a wild goose chase clicking unlabeled links. The following example does not include an alternative menu for the image map.
Our library Page When viewed through a graphical browser such as Netscape Navigator or Internet Explorer, a beautiful picture of a floor map of a library appears. The visitor can choose selected areas of the library to view. When a visitor using a text-based browser visits the site, this is what he sees: Our Library Page [ISMAP]
At this point the visitor is stuck, because text-based browsers will not interpret the hypertext links embedded in the image map. His only option is to back out of the site. A visitor who uses a text-based browser, perhaps because he is blind, can't get to your information unless an alternative is provided. The accessibility of an image map depends on the software used as a website's server. Check with your system administrator to find out about the capabilities of your Web server software. Some server software will automatically render text links for image maps while other versions will not. Providing text alternatives to image-based links will ensure image maps are available to the widest audience.
-Include descriptive captions for pictures and transcriptions of manuscript images. Providing ALT text for an image is sufficient for logos and graphics that contain little information content. However, if the graphics provide more extensive information, adding captions and transcriptions is important for those who cannot see your page because they are using a text-based browser or they have turned off the graphics loading feature of their browser. This includes people who are blind. If you are not sure how critical a particular image is to the content of a page, temporarily remove it and consider the impact of its loss. If you present information in an image format, such as a scanned-in image of a page of a manuscript, be sure to also provide a transcription of the manuscript in a straight text format. This alternative is useful for many visitors, including those with visual impairments and those with learning disabilities who may have difficulty reading the original document.
- Use a NULL value for unimportant graphics. Some graphical elements may add no content to a page and can be bypassed from viewing by using an ALT attribute with no text. By using just two quotation marks with no content, you can reduce the amount of distracting text when a page is viewed with graphics capabilities turned off or with a text-based browser. For example, the HTML for a divider bar could be: Sighted visitors will see the divider bar, while those visiting via a text browser will see/hear nothing.
-Provide audio description and captions or transcripts of video. If your multimedia resources provided on your site include video, people who can not see will be unable to use this information unless it is provided in an alternative format. A synchronized text transcription provided with the video will give a visitor who cannot see, or who doesn't have the appropriate viewing software, access to the information in your video clip. Their screen reader will read aloud the text transcription. It is also important to describe what is happening in the movie for users who may not be able to see what is happening. An alternative to the synchronized text track would be a transcript of the video providing both descriptions of what is happening and also the audio transcript.
Captions on a video and transcripts also provide access to the content for those who cannot hear. (Resources below for captioning video and audio description for video) Always provide a text version of any stand-alone audio files. If the clip is short, you can place the text in the link or in the ALT tag of an image associated with the link. If the file is long, you may want to consider linking to a page that contains the transcript. If you use sound to enhance a page, provide text to describe the sound. This is especially important if you embed sounds that are played automatically. You should always give the user the ability to turn the sound off.
Apple's QuickTime allows you to provide captions which can be synchronized with the movie. For more information, view Apple's QuickTime and SMIL (http://www.apple.com/quicktime/authoring/qtsmil.html). The World Wide Web Consortium has developed a standard for synchronizing media used in multimedia files. This standard is known as Synchronized Multimedia Integration Language (http://www.w3.org/TR/REC-smil/). Many companies have developed products which allow you to develop multimedia for the Web. Most of these products produce files that are played using Real Networks G2 player. A list of development tools is provided by Streaming Media World (http://smw.internet.com/smil/tools/authoring.html).
- Consider other options for making graphical features accessible. Some Web designers make an image accessible by placing a hyperlink "D" (for description) immediately before or after an image that links to another page with an image description. At the end of each description another hyperlink returns the user to the original page. This method should be used with caution as it can add unnecessary navigational complexity to the site. Example: D) The linked page contains the following: "A globe, marked with a grid, tilts at an angle. A keyhole is cut into its surface. This image is used to denote that a website contains accessibility features to accommodate the needs of users with disabilities. The graphic is linked to the following website: http://ncam.wgbh.org/
Some organizations with graphic-intensive Web pages provide a separate text version of their site to ensure accessibility. This adds maintenance time and complexity because two versions of a site must be updated simultaneously. It also segregates site visitors according to the type of equipment they use to access the Web. As much as possible, design a single version of your site so that it is accessible to all visitors.
- Provide alternatives for forms and databases. Some combinations of browsers and screen readers encounter errors with nonstandard or complex forms. Always test forms and databases with a text-based browser. Include an e-mail address and other contact information for those who cannot use your forms or database.
Resources for Accessible Web Page Design and for Electronic and Information Technology
Legal Requirements and Guidelines Related to Accessible Programs and Services
Americans with Disabilities Act (1990)
Americans with Disabilities Act, Title II-¿35.150, Existing Facilities
Rehabilitation Act, Section 504 (1973)
Rehabilitation Act, Section 508, As Amended in 1998
In 2001 the U.S. Architectural and Transportation Barriers Compliance Board (Access Board) developed standards to which Web pages of Federal agencies must comply. http://www.access-board.gov/sec508/508standards.htm.
The Assistive Technology Act of 1998 P.L. 105-394 requires that the state agencies of states that accept funding under this Act comply with Section 508. The list of guidelines for accessibility provides a good model even for organizations that are not required to comply. http://www.section508.gov/docs/AT1998.html
Workforce Investment Act of 1998, Section 188 - Nondiscrimination As clarified in ¿29 CFR Part 37, requires a recipient to provide both accessible facilities (that is, both program accessibility and architectural accessibility) and reasonable accommodations, as modeled by Title II of the Americans with Disabilities Act.
Implications of Section 508 for Higher Education Section 508 applies directly to Federal agencies, but its impact is much broader. Some Federal legislation requires compliance to the Section 508 standards as a condition of funding, such as the Assistive Technology Act of 1988, (www.section508.gov/docs/AT1998.html). In general, the degree and manner in which these standards "carry down" with Federal funding is not clear and is being explored in a number of court cases.
- Many state and local government entities and other institutions have voluntarily adopted the Section 508 standards, such as Texas and Arizona. Universities that have adopted the standards include the University of Hawaii and the University of Georgia.
- Since Section 508 was passed, a large effort has been underway throughout the Federal government to make websites accessible. Books, Web tutorials, and classes on accessible Web design have been created. Faced with the threat of losing the Federal government as a customer, many software companies have modified their products to make them more accessible.
- Web publishing programs such as Macromedia DreamWeaver, Microsoft Frontpage, and Adobe GoLive now include features to help design accessible websites.
Detailed Information on Section 508 Technical Standards
For further information on Section 508:
The World Wide Web Consortium (W3C) develops the common protocols used on the Web to insure interoperability to promote universal access (http://www.w3.org/WAI/). The W3C's Web Accessibility Initiative (WAI) has proposed guidelines for all Web authors. As Tim Berners-Lee, Director of the W3C puts it: "The power of the Web is in its universality. Access by everyone regardless of disability is an essential aspect."
Material Development Promotional materials, in a variety of accessible formats and media, should be developed by entities to market the availability of their accessible technologies and services.
Back cover: Oklahoma ABLE Tech Oklahoma State University Seretean Wellness Center 1514 W. Hall of Fame Stillwater, OK 74078 1-800-257-1705 Voice/TTY 405-744-2487 (Fax) http://okabletech.okstate.edu
Publication funded by the Disability Law Resource Project, Federal Region VI NIDRR Grant No. H133D010210. Serving: Arkansas, Louisiana, New Mexico, Oklahoma, and Texas Address: Independent Living Research Utilization (ILRU) Suite 1000 2323 South Shepherd Houston, TX 77019 (713) 520-0232 (800) 949-4232 TTY: (713) 520-5136 http://www.ilru.org/dbtac/index.html
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