Table 1 Dialogue Principles according to ISO 9241-10 [22, 49]
Dialogue Principles | Definition |
|---|---|
Suitability for the task | A dialogue is suitable, if it helps the user to complete their tasks effectively and efficiently. Only those parts of the software are presented, which are necessary to fulfil the task. |
Self-descriptiveness | A dialogue is self-descriptive, if every step is understandable in an intuitive way, or, in case of mistakes supported by immediate feedback. Further, an adequate support should be offered on demand. |
Controllability | A dialogue is controllable, if the user is able to start the sequence and influence its direction as well as speed until they reach their aim. |
Conformity with users expectations | A dialogue conforms with users expectations, if it is consistent, complying with the characteristics of the user, e.g. taking their knowledge in their special working area into account, likewise their education and experience as well as general acknowledged conventions. |
Error tolerance | A dialogue is error tolerant, if the intended deliverable is reached with no or just minimal additional effort, despite of obvious faulty steering or wrong input. |
Suitability for individualization | A dialogue is suitable for individualization, if the system allows customizing according to the task as well as regarding the individual capabilities and preferences of a user. |
Suitability for learning | A dialogue supports suitability of learning, if the user is accompanied through different states of their learning process and the effort for learning is as low as possible. |