Human computer interaction.pdf

Human computer interaction.pdf - Chapter 1 Interactive...

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1 Chapter 1. Interactive Systems Table of Contents Context ....................................................................................................................... 1 Objectives .................................................................................................................... 2 Interactive Systems ....................................................................................................... 2 The Past .............................................................................................................. 2 The Present .......................................................................................................... 2 The Future ........................................................................................................... 3 Usefulness and Usability ................................................................................................ 4 Usefulness ........................................................................................................... 4 Usability .............................................................................................................. 4 Why is HCI important? .................................................................................................. 5 Productivity ......................................................................................................... 5 Quality of Life ..................................................................................................... 5 Safety-critical systems and disasters ......................................................................... 6 Designing and Evaluating usefulness and usability .............................................................. 7 Design ................................................................................................................ 7 Evaluation ........................................................................................................... 8 The HCI Discipline ....................................................................................................... 8 History ................................................................................................................ 8 Who does HCI ..................................................................................................... 9 Disciplines involved ............................................................................................ 10 The Rest of this Course ................................................................................................ 10 Online Resources ........................................................................................................ 10 Activity 6 - Using the ACM Digital Library ............................................................. 11 Summary ................................................................................................................... 11 Answers and Discussions .............................................................................................. 11 Discussion of Activity 1 ....................................................................................... 11 Discussion of Activity 2 ....................................................................................... 11 Discussion of Activity 3 ....................................................................................... 12 Answer to Review Question 4 ............................................................................... 12 Answer to Review Question 1 ............................................................................... 12 Answer to Review Question 2 ............................................................................... 12 Answer to Review Question 3 ............................................................................... 13 Answer to Review Question 4 ............................................................................... 13 Answer to Review Question 5 ............................................................................... 13 Answer to Review Question 6 ............................................................................... 13 "I think there is a world market for maybe five computers." - Thomas Watson, chairman of IBM, 1943 "There is no reason anyone would want a computer in their home." - Ken Olson, president, chairman and founder of DEC Context This unit introduces the specialist computing area known as Human Computer Interaction (or HCI for short). One aim of the unit is to give you a clear understanding of what practitioners and researchers in this field know and do. Importantly, too, the unit will try to motivate you to see that HCI is a vital component of successful systems development by giving success stories where the user was considered in the design and failures where the users were overlooked. The unit will also outline the other units in the course and give full details of the assessment scheme used.
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Interactive Systems 2 Objectives At the end of this unit you will be able to: Understand the nature of an interactive computer system Distinguish between design and evaluation processes in an interactive computer system Place the specialist area of HCI within the broader area of Computing and systems development. Argue the importance of HCI practices within interactive systems development. Know what is required to complete the course – the knowledge, skills and assessments involved. Interactive Systems The Past This module is about the design and evaluation of a class of systems that were not even envisaged until relatively recently. Until the 1980s almost all commercial computer systems were non-interactive. Computer operators would set-up the machines to read in large volumes of data – say customers bank details and transactions – and the computer would then process each input and generate appropriate output. The Present There are still lots of these systems in place but the world is also now full of interactive computer systems. These are systems that involve users in a direct way.
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