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Time Estimation as a Measure of Mental Workload
Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Information Science.
Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Information Science.
2007 (English)In: Engineering Psychology and Cognitive Ergonomics, Proceedings / [ed] Harris, D, 2007, 359-365 p.Conference paper, Published paper (Refereed)
Abstract [en]

Technical systems of different kinds might differ in the mental demands they put on their users while being equally usable in a more conventional sense. Several methods exist that measure mental workload. However, in the everyday practice of usability evaluations, none of these methods seems to be used. This is probably due to the amount of effort needed to use them. The study of our errors in estimation of durations show that errors increase as a function of the amount of attentional resources being needed for other concurrent tasks. This points towards a simple way of estimating mental workload. By asking people to provide estimates of elapsed time after a task, disruptions in their estimates could indicate the mental workload of the task. We conducted a first study aimed at validating this idea with the NASA TLX method. Results show that errors in time estimates correlate significantly with TLX scores.

Place, publisher, year, edition, pages
2007. 359-365 p.
Series
Lecture Notes in Artificial Intelligence, ISSN 0302-9743 ; 4562
Keyword [en]
mental workload, time estimation, usability
National Category
Computer Science
Research subject
Computer Science
Identifiers
URN: urn:nbn:se:uu:diva-26725DOI: 10.1007/978-3-540-73331-7_39ISI: 000248248000039ISBN: 978-3-540-73330-0 (print)OAI: oai:DiVA.org:uu-26725DiVA: diva2:54594
Conference
7th International Conference on Engineering Psychology and Cognitive Ergonomics held at the HCI International 2007 Beijing, PEOPLES R CHINA, JUL 22-27, 2007
Available from: 2008-10-17 Created: 2008-10-17 Last updated: 2011-04-14Bibliographically approved

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