HCI (Human
Computer Interfaces)
By hearing this name, we can easily
say that HCI are the techniques that facilitate the interaction between users
and computers. Researchers in this field try to observe new ways of interaction
with computers and design technologies that make these ways possible to be
applied in HCI. Human computer interfaces can be defined as the science which
concerns with the communication of human and machine by designing, evaluating
and implementing systems for human use. Both machine and human sides are
required for supporting these systems for the mixing of computer &
programming techniques and human factors.
Interests of HCI Researchers
-
The optimization of designs
for adding new properties such as efficiency and that will be achieved by
designing new HCI systems.
-
Using software libraries for the
implementation of Human-Computer interfaces.
-
The evaluation of Human
computer interfaces with respect to the usability of them.
-
Improving methods for
recognizing the identity of the user to know whether it is a human or computer.
HCI Design Principles
·
The focus on tasks and users: That will
be done by defining the performance of the task and the users needed to perform
this task.
·
Empirical Measurement: By the
early testing of the interface with real users and making sure that the
performance level of users may lead to varying the results.
·
Iterative Design: This will
be done as follow:
ü Designing the user interface.
ü Testing.
ü Analyzing the results.
ü Repeat the steps.
Aspects of Interaction Loop in HCI
-
Visual Based: researchers
focus on this area of HCI in their research so it's considered as the most
widespread area in HCI.
-
Audio Based: It's
considered as the area of information which provided by audio signals. It's
also an important area of HCI systems.
-
Task
Environment: It's considered as the conditions and goals of the
task.
-
Machine
Environment: It's considered as the environment in which the
computer exists.
-
Interface Areas: they involve
the processes of the human and computer.
-
Input Flow: The
information flow which begins in the environment of the task upon the use of
computer by the user.
-
Output: The
information flow which originates in the environment of the machine.
-
Feedback: The
evaluation and confirmation of the processes by the interface loops when they
pass from the computer to the human through the interface and vice versa.
-
Fit:
The
optimization of the human resources in order to complete the task depending on
the user, the computer and the task itself.
HCI Characteristics
-
High-functionality systems. There
is no limit for the number of functions associated with the systems.
-
Mixed Media. Formatted data,
voice, images…etc. can be handled by the systems which allow the users to
exchange communication links.
-
High-bandwidth Interaction.
The changes of devices, graphics, media and speed may increase the rate of
interaction between human and computer.
-
Information utilities. The
improvement of interfaces quality will be expected to increase the rate of
proliferation of information utilities and industry services.
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