1. the human

EXERCISE 1.11 [extra - not in book]

What is the difference between a slip and a conceptual error? How might a designer minimise the occurrence of both among users of a system?

answer available for tutors only

A slip is an error that occurs when the context of skilled behaviour is changed. A conceptual error occurs due to lack of understanding on the part of the user. This may be a result of an inadequate or incorrect mental model. Answer should discuss ways of supporting mental models - e.g. transferring user's knowledge from other domains, using familiar objects, maintaining consistency between platforms, providing feedback, etc. Slips can be avoided by ensuring consistency, taking account of stress in skilled operation, etc.

Other exercises in this chapter

ex.1.1 (ans), ex.1.2 (ans), ex.1.3 (ans), ex.1.4 (tut), ex.1.5 (tut), ex.1.6 (open), ex.1.7 (open), ex.1.8 (tut), ex.1.9 (tut), ex.1.10 (tut), ex.1.11 (tut), ex.1.12 (tut), ex.1.13 (tut), ex.1.14 (tut)

all exercises for this chapter