A usability evaluation of text and speech redundant help messages on a reader interface

• 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.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Produktionsteknik, arbetsvetenskap och ergonomi (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Production Engineering, Human Work Science and Ergonomics (hsv//eng)

Nyckelord

Industrial Work Environment

Industriell produktionsmiljö

Publikations- och innehållstyp

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