[Author: Bill Fischer]
Also known as slide-shows, slide-decks, and PowerPoints, these interactive media also need to be accessible and universal whether being presented to an audience or users engaging directly with them. All of the universal design principles that center around attainability, responsiveness, and cognitive load apply to presentations.
For The Sight Impaired
- Each slide should include a text summary of what you would say, in a way that can be understood as a stand-alone experience. This will also be helpful to viewers engaging with the presentation without the speaker delivering it.
- Text should be written in a visual narrative style. When this text is read aloud by a screen reader or delivered as pre-recorded audio, the visuals should be described.
- Using typed-text (not image text) and image alt tag descriptions is a must for sight impaired persons using screen readers.
- An audio play button that automatically reads the text and describes the image would provide access to the sight impaired. An example screen from an I-See-U presentation is shown below. Google Slides and PowerPoint have this capability built-in. The image below shows a screen capture of the I-See-U Google Slides presentation with embedded audio.
For the Hearing Impaired
- Each slide should include a text summary of what you would say that serves as captions. They should be written in a way that can be understood as a stand-alone experience.
- Integrated or linked video must be captioned
- For strictly live presentations, and when captions are not integrated, Google Slides live captioning can be turned on. The image below shows a screen capture of the I-See-U presentation with extra-large live captions turned-on.
Video-Captions and Transcripts for On-line Engagement
Creating a video version with Captions and Transcripts is another way to make a slide-show accessible. 3Play media has collaborated with University of South Florida to create a method for this that is reinforced by research performed at the university.
You can see an example of captions and Transcripts (external link) on the 3Play Media website.
Note: this solution is not particularly phone-friendly. due to small text and awkward scrolling.