UNIVERSITY EXAMINATIONS: 2014/2015
EXAMINATION FOR THE DIPLOMA IN INFORMATION
DIT 406 HUMAN COMPUTER INTERACTION
DATE: AUGUST 2016 TIME: 1½HOURS
INSTRUCTIONS: Answer Any THREE Questions.
a) Define the following terms as used in Human Computer Interaction:
i) Metaphor [2 Marks]
ii) Interactive design [2 Marks]
iii)Conceptual model [2 Marks]
b) Describe the term user-centered design? [2 Marks]
c) Discuss how evaluation fits into a user-centered design lifecycle [2 Marks]
d) Describe two techniques for evaluation, highlighting their key points and the differences
between them [4 Marks]
e) Name three physical input devices that can be used to perform selections? [6 Marks]
a) The Beat Corporation has won a contract to develop the interface to a media player for digital
music in a range of formats, such as MP3 and WMA. In contrast to many of these applications,
the interface is being designed to support elderly users. Write a brief technical report for your
project manager to describe how you would develop the detailed requirements for this interface.
You must identify any potential problems that could affect your proposal. [10 Marks]
b) Contrast the different problems that can arise when designers attempt to identify the
requirements for interactive systems from novice and expert users [10 Marks]
a) Many everyday systems and products seem to be designed with little regard to usability a
system is regarded as usable when it has considered some factors, explain four of this factors
b) Environmental factors can impair users’ ability to recall information that is necessary to
cooperate complex, computer systems. Briefly explain how such disruptions can impair both
short-term AND long-term memory. [6 Marks]
c) You have been asked to help in the development of a new computerized call centre.
Customers from a national Bank will ring up if they wish to change the details of their account.
For instance, they might want to open a new account, close an old account, they might want to
change the address of the person who owns the account and so on.
i) Briefly explain how you might use a number of different requirements elicitation
techniques to identify the potential usability problems that might arise for people working with
this new system. [8 Marks]
ii) Identify the principle strengths and weaknesses of each technique [2 Marks]
a) Describe by use of the diagram the Extended human information processing
b) Explain the types of user support which might be required for the system . [2 Marks]
c) How can the designers and users bridge the gulf of evaluation and gulf execution
d) How can the designers and users bridge the gulf of execution [2 Marks]
d) What happens if the user’s conceptual model does not match the designers conceptual model?
e) Discuss the term mapping in terms of GUI design [2 Marks]
a) Based on your experience, give an example of a software tool (application) that allows
significant interaction via direct manipulation.
i. Indicate your views on the positive and negative aspects of working with this tool.
ii. Compare the constructivist and ecological theories of perception and give examples of how
each has influenced interface design [6 Marks]
b) Discuss an example of an affordance in a real world, physical object and in a user interface.