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References Navigation arrow Authors Navigation arrow Arnout R. H. Fischer
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Arnout R. H. Fischer

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Publications by Arnout R. H. Fischer (bibliography)

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Fischer, Arnout R. H., Blommaert, Frans J. J. and Midden, Cees J. H. (2005): Monitoring and Evaluation of Time Delay. In International Journal of Human-Computer Interaction, 19 (2) pp. 163-180

“In general, users act as if their behavior is controlled by a self-regulatory system (Carver & Scheier, 1998) during user-system interaction. The self-regulatory system is specified as a feedback control mechanism consisting of monitoring, evaluation, and action adjustment mechanisms. This article investigates whether perception processes take care of monitoring, and if a user's evaluation is based on the interpretation of the results of such monitoring. To do this, a typical system property, time delay, was manipulated. In an experiment, the relation between estimated task duration and actual time-to-task completion was studied. The findings support the premise that perception processes, interpreted as a monitoring mechanism, can keep track of physical task time. A monotonic, positive relation was found between the time-to-task completion and user satisfaction, which supports the assumption that objective efficiency influences the evaluation of interaction. A linear relation between the estimated duration and user satisfaction indicates that the monitoring mechanism transforms physical signals into a format that can be used in the evaluation process, thereby changing the internal reference frame of the evaluation mechanism.”

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Fischer, Arnout R. H., Price, Kathleen J. and Sears, Andrew (2005): Speech-Based Text Entry for Mobile Handheld Devices: An Analysis of Efficacy and Error Correction Techniques for Server-Based Solutions. In International Journal of Human-Computer Interaction, 19 (3) pp. 279-304

“As handheld devices become ubiquitous and the tasks performed become multipurpose in nature, efficient data entry techniques are necessary. This research evaluated several speech-based text entry solutions for handheld devices using server-based speech recognition. Because server-based solutions introduce network delays, an analysis of the relationship among network delays, number of recognition errors, how fast users can correct errors, and overall data entry rates was performed. The analysis and empirical results confirm the importance of minimizing recognition errors. This suggests that a server-based approach that makes more computing resources available may prove effective. Results from two empirical studies are presented. The first compares two error correction mechanisms: a multitap and soft keyboard solution. The second employs a longitudinal investigation of the effects of experience on text entry rates. Users attained an effective mean text entry rate as high as 25.3 words per min, which is higher than or comparable to data entry rates reported for other input techniques for handheld devices. The results of this research have implications for researchers and designers of automatic speech recognition systems and mobile devices.”

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Changes to this page (author)

19 Feb 2010: Enabled abstracts to be shown on Arnout R. H. Fischer's author page.
26 Jul 2007: Author was edited
26 Jul 2007: Author was added to the bibliography

Publication statistics

Publication period:2005-2005
Publication count:2
Number of co-authors:4



Productive colleagues

Arnout R. H. Fischer's 3 most productive colleagues in number of publications:

Andrew Sears:71
Cees J. H. Midden:8
Kathleen J. Price:5


Collaboration count

Number of publications with 3 favourite co-authors:

Andrew Sears:1
Kathleen J. Price:1
Cees J. H. Midden:1

 

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Mar 21

“ Software design is the act of determining the user's experience with a piece of software. It has nothing to do with how the code works inside, or how big or small the code is. The designer's task is to specify completely and unambiguously the user's whole experience. ”

-- David Liddle, From Bringing Design to Software, edited by Terry Winograd, 1996 ”

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Eva Hornecker on Tangible Interaction

Eva Hornecker explains the evolving concept of Tangible Interaction.

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