Accessibility and Usability

The ISO 9241 standard defines usability as the "extent to which a system, product or service can be used by specified users to achieve specified goals with effectiveness, efficiency and satisfaction in a specified context of use". 

In the context of the definition above, satisfaction means: 

Which one of the following best represents memorability, in the context usability engineering? 

Nielsen (2013) defines usability as "[u]sability is a quality attribute that assesses how easy user interfaces are to use", consisting of five (5) quality components: 

Which one of the following best represents learnability, in the context usability engineering? 

The ISO 9241 standard defines usability as the "extent to which a system, product or service can be used by specified users to achieve specified goals with effectiveness, efficiency and satisfaction in a specified context of use". 

In the context of the definition above, efficiency means:

The ISO 9241 standard defines usability as the "extent to which a system, product or service can be used by specified users to achieve specified goals with effectiveness, efficiency and satisfaction in a specified context of use". 

In the context of the definition above, context of use means: 

The ISO 9241 standard defines usability as the "extent to which a system, product or service can be used by specified users to achieve specified goals with effectiveness, efficiency and satisfaction in a specified context of use". 

In the context of the definition above, effectiveness means: 

Interval data: 

Summative usability evaluations answer this question:

Time on task is an example of: 

Assume that five (5) participants have taken part in a usability testing study using the Single Ease Question (SEQ).

The responses recorded are: 5, 6, 7, 6, 6.

The MEAN is:

Ordinal data:

Assume that five (5) participants have taken part in a usability testing study using the Single Ease Question (SEQ).

The responses recorded are: 5, 7, 7, 7, 7.

The MODE is:

Formative usability evaluations answer this question: 

Binary task success is an example of: 

Tullis and Stetson (2004) have shown that it is possible to get reliable results using the System Usability Scale (SUS) with a sample of: 

Nominal data: 

It's also important to identify the language in which web content is written using the lang attribute in the page code. This better ensures that the content will be presented appropriately and read audibly by screen readers in the correct language.

The passage above relates to which of the following POUR user-centered principles of accessibility:

Although the web is thought of as primarily a visual medium, it also carries Zoom meetings, Netflix streams, podcasts, and other audio-heavy content. Technologies and methods exist for making audio information available to users with auditory disabilities. These technologies and methods can only help users, though, if designers and developers use them to make the information accessible to users who cannot hear it.

The passage above relates to which of the following POUR user-centered principles of accessibility:

Typically, browsers accommodate some sloppy coding—a missing </p> tag will not crash the page, for example—but they cannot correct or compensate for all errors and inconsistencies that developers introduce in web content. The best way to ensure that content displays properly and accessibly across browsers, platforms, and assistive technologies is to write valid HTML and ARIA.

The passage above relates to which of the following POUR user-centered principles of accessibility:

The four (4) WCAG 2 user-centered principles of accessibility are: 

Users with full vision can read text, view images, understand visual cues in page layouts, interpret symbolic meaning of colors, and so on. This mode of perception is powerful, and designers should take full advantage of its communicative strengths. For people who are deaf, visual cues take on heightened importance.

However, users who are blind or vision-impaired cannot take full advantage of this mode of communication. For these users, information must be presented in a format which they can more easily perceive, such as audio. Screen readers can perform some of this conversion, if the content is designed with accessibility in mind.

The passage above relates to which of the following POUR user-centered principles of accessibility:

Not everyone uses a standard keyboard and mouse to access the web. Some people use adaptive devices or alternative devices that accommodate their disabilities or preferences. Content that is only operable through mouse clicks will be inaccessible to users who cannot use a mouse—due to tremors, motor disabilities, or even a lack of hands altogether. A person in this situation is likely to use an adaptive technology of some sort, such as a mouth stick, to manipulate the keyboard. In some cases, the person may be able to use a trackball mouse (e.g., with a mouth stick), but others rely on the functionality of the keyboard. People who are blind also often rely on the keyboard, since a mouse requires eye-hand coordination.

The passage above relates to which of the following POUR user-centered principles of accessibility:

Assume you have 3 or 4 sentences of text.  How would you mark it up in HTML5? 

Assume that you have a list of items that have a sequence.  How would you mark it up?

In HTML5, how would you add a comment to a HTML document: 

5 quality components of usability:

Usability metrics for effectiveness (measuring effectiveness):

Usability metrics for efficiency (measuring efficiency):

Usability metrics for satisfaction (measuring satisfaction):

Descriptive statistics to analyse data: