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- Shahnavaz, Houshang, et al.
(författare)
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A usability evaluation of text and speech redundant help messages on a reader interface
- 1993
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Ingår i: Human-computer interaction. - Amsterdam : Elsevier. - 044489540X ; , s. 724-729
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Konferensbidrag (refereegranskat)abstract
- The purpose of this study is to investigate whether text and speech redundant help messages are more usable than non-redundant messages on a reader interface. This paper looks at the principles underlying multi-media. The hypothesis is that if a speech and text redundant message is presented on a reader interface, then the users should have less difficulties or errors and shorter performance time in such tasks, by using such a (redundant) interface than using the text interface or speech interface. Four evaluation tools, i.e., observations, subjective ratings, interviews, and objective performance measures, were used to evaluate the effects of the messages. Twenty subjects (9 males and 11 females) from the general public participated in the study. The results partly support our hypothesis by showing that the redundant interface is the easiest and quickest among the three in terms of learning and using. Appropriate use of text and speech redundant help messages does contribute to the usability of the reader interface for the tested condition. However, the adverse effects of the speech, e.g., repeat messages are annoying, must be dealt with care.
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- Wang, E., et al.
(författare)
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A verification of the evaluation tools for evaluating multi-media co-operative authoring emulation
- 1990
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Ingår i: International conference on Integrated Broadband Services and Networks. - London : Institution of Engineering and Technology. - 0852960026 ; , s. 335-340
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Konferensbidrag (refereegranskat)abstract
- For the development of integrated broadband communication (IBC) services, the usability of the system is one of the main factors which contribute to the success of the system. This paper describes and discusses the preliminary results of a multi-author multi-media authoring pilot study which was carried out to verifying the candidate evaluation tools to ensure that these tools can be used for evaluating the yet-to-be specified candidate usability principles for IBC services. Based on the assumed usability characteristics, evaluation tools (observation, questionnaires, interview, and objective data recording) were developed and tested. It is suggested that several evaluation tools should be used for complementing each other and accomplishing a more complete and accurate evaluation
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