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Dialogue design in speech-mediated data-entry: The role of syntactic constraints and feedback

Murray, A. C., Jones, Dylan Marc ORCID: and Frankish, C. R. 1996. Dialogue design in speech-mediated data-entry: The role of syntactic constraints and feedback. International Journal of Human-Computer Studies 45 (3) , pp. 263-286. 10.1006/ijhc.1996.0052

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Human-computer interfaces which use speech as the medium for interaction present unique problems for human factors research, due to the fact that automatic speech recognition (ASR) technology is still error prone. The experiments described here address the design of ASR interfaces for data-entry tasks. Particular emphasis was placed on human factors, and users' data-entry performance was compared using not only quantitative measures of speed and accuracy but also more qualitative analyses of user-errors. Experiment 1 investigated the merits of using closed word-sets (syntax) to enhance recognition accuracy. Participants used a purely auditory interface (i.e. one with no visual component to it) programmed to exercise Full Syntacticconstraints (FS), Partial Syntacticconstraints (PS) or No Syntacticconstraints (NS) on the set of words available for recognition at any given time in the data-entry dialogue. Comparisons of data-entry performance showed an advantage of syntax in terms of ASR performance, and when errors and their consequences were taken into account PS was shown to accommodate users' attempts at error-correction more readily than FS. Experiment 2 compared design options for visual prompts and feedback: a limited area of the visual display was dedicated to the provision of prompts and feedback supporting the spoken data-entry dialogue. Two styles of visual prompt were contrasted: Options Prompts (OP) which displayed the full set of current options for input, and Fieldname Prompts (FP) which displayed only the current Fieldname but could be expanded on command to include the relevant options. The results showed that overall OP led to more efficient performance than FP. The errors made by users in the absence of visual feedback were compared with those occurring when the visual component was included in the interface. Recommendations for design of ASR systems for data-entry tasks are made based on the experimental results.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Psychology
Subjects: B Philosophy. Psychology. Religion > BF Psychology
R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Publisher: Elsevier
ISSN: 1071-5819
Last Modified: 21 Oct 2022 09:08

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