C
- Card
Sorting
- Card sorting is a categorization method where users sort cards depicting
various concepts into categories. You start with
a list of all the items you want sorted. Write down
each item on a separate index card. Give your user(s)
the stack of cards and have them divide the cards
up into piles, telling them that the cards should
be grouped the way they (the users) best see fit.
This technique is best used in the early stages
of development.
- Cascade
- The CSS
cascade assigns a weight to each style rule. When several
rules apply, the one with the greatest weight takes
precedence. You can think of some rules coming from "higher
up" in the cascade; these combine with the rules at the
next level down, and the result combines with the next
level, and so on, until finally you have the actual rules
to be applied to the document pooled at the "base" of the
cascade.
The cascade is the mechanism by which rules from
different places are combined to create an
über-stylesheet
- Cascading
Style Sheets (CSS)
- Style sheets refer to a set of rules that allow you to control how
you would like your document to be rendered. It
is a mechanism to primarily separate presentation
from content. With the HTML and style sheets approach, structured
content goes into the HTML document, and the appearance,
or presentation information goes into a style sheet.
CSS allow
you to control the rendering of elements on a web
page without compromising its structure. Before
CSS , nearly all of the presentational
attributes of an HTML document were contained within
the HTML code; all font colors, background
styles, alignment specification, boxes, borders,
and sizes had to be explicitly described, often
repeatedly, in the midst of the HTML code. CSS allows web designers to extract this
information, resulting in considerably simpler HTML
code, supplemented by an auxiliary style sheet written
in the language of CSS
. The structure and semantic markup is restricted
to the HTML
code, while the presentational markup is restricted
to the CSS code.
- Captions
- Captions are text transcripts that are synchronized
with other audio or visual tracks. Captions convey
information about spoken words and non-spoken sounds such
as sound effects. They benefit people who are deaf or
hard-of-hearing, and anyone who cannot hear the audio
(e.g., Someone in a noisy environment). Captions are
generally rendered graphically above, below, or
superimposed over video. Captions can be closed or open.
Closed captions are encoded or invisible and
must be decoded or made visible. Open captions
can't be turned off.
- Center for Applied
Special Technology (CAST)
- The organization that originally developed the website accessibility
checker Bobby.
- Child
- In HTML,
an element A is called the child of element B if an only if
B is the parent of A.
- Chunking
- Chunking is the way that the brain deals with complexity. Humans short
term memory can retain, at most, only about 7±2
things at one time according to George A. Miller.
- "Click
Here"
- The phrase "click here" is a bad linking practice. It makes navigating
the web difficult for both sighted and unsighted
users. Link text should be meaningful enough to
make sense when read out of context.
- Cognitive Disability
- A disability involves a person's capacity for processing information
and knowledge.
- Cognitive Walkthrough
- A cognitive walkthrough is a review technique where you
construct task scenarios from a specification and get a
user to role play the part of walking through the task.
They act as if the interface was actually built and they
(in the role of a typical user) was working through the
tasks. Each step the user would take is scrutinize.
- Color
Contrast
- Color contrast refers to how close hues are in value.
The human eye requires good contrast for visibility and
legibility. Contrast creates visual interest and helps
deliver accurate information. It can make a big difference
on a web page. Colors that are close in value tend to blur
together, and their borders "melt." This can create
legibility problems. For example, black text on a dark blue
background is difficult to read.
- Color Deficiency
- Color deficiency is a lack of the ability to
discriminate between colors. Designs that rely totally on
color to convey essential information will be inaccessible
to a small percentage of women and a larger percentage of
men.
- Color Saturation
- Color saturation refers to the intensity of a
color.
- Content Management
System
- A content management system separates the content of a
Web site from its code, allowing nontechnical users to
update, approve and post content.
- Controlled Vocabulary
- A controlled vocabulary is a list of terms that have
been specified explicitly. All terms in a controlled
vocabulary should have a clear-cut, non-redundant
definition.
- Composite Capabilities/Preference
Profiles (CC/PP)
- CC/PP profiles are a method that allows a description
of device capabilities and user preferences to be delivered
to the server, so that content can be adapted to the device
according the preferences of the user.
- Consistency
- Consistency is the quality of an interface when it
behaves in ways users expect. It means that users can apply
the knowledge obtained in some previous experience to
enhance current performance.
- Contextual Inquiry
- Contextual inquiry is a structured field interviewing
usability evaluation method. It involves conversation as
well as observation. Contextual inquiries requires a high
degree of skill from the usability specialist, in order to
ask appropriate questions without interrupting the
participants' work flow or influencing their responses.
Sometimes two usability specialists are used for a
contextual inquiry project, one to conduct the interview,
and one to observe and record participant behavior. You can
discover unmet needs and understand existing behaviors in
greater depth with this method.
- Contextual Selector
- In CSS, a
Contextual selector is a type of selector that selects by
the context in which an element or attribute occurs in the
markup structure of a document.
- Control Structures
- In programming, control structures are used to control
the logical flow through a script..
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