a) Please provide BRIEF answers to the following questions:

1. Name three physical input devices that can be used to perform selections?
2. Briefly distinguish between perception and cognition.
3. What is desktop virtual reality?
4. Why is subjective satisfaction difficult to measure?
5. What is participatory design?

[2 marks per answer, 10 marks in total]

b) Briefly explain the relationship between requirements elicitation and the summative evaluation of an interactive system.

[3 marks]

c) Contrast the different problems that can arise when designers attempt to identify the requirements for interactive systems from novice and expert users.

[6 marks]

d) The Johnson 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.

[6 marks]