Conference article

Verbally Assisted Haptic Graph Comprehension: The Role of Taking Initiative in Joint Activity

Özge Alaçam
Department of Informatics, University of Hamburg, Germany

Christopher Habel
Department of Informatics, University of Hamburg, Germany

Cengiz Acartürk
Cognitive Science, Middle East Technical University, Turkey

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Published in: Proceedings of the 2nd European and the 5th Nordic Symposium on Multimodal Communication, August 6-8, 2014, Tartu, Estonia

Linköping Electronic Conference Proceedings 110:4, p. 17-24

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Published: 2015-05-26

ISBN: 978-91-7519-074-7

ISSN: 1650-3686 (print), 1650-3740 (online)

Abstract

Statistical graphs are tools for multimodal communication in daily life settings. For visually impaired people, haptic interfaces provide perceptual access to the information provided by the graph. Haptic comprehension can be facilitated by audio and verbal assistance. We investigate the circumstances un- der which verbal assistance facilitates haptic comprehension of graphs. For this, we focus on cases where unaided haptic graph comprehension has limitations, such as when describing a global (rather than a local) maximum. In an experiment that employed a joint activity setting, we observed two major factors for facilitating haptic-graph comprehension by providing verbal assistance: First, the results re- vealed significant impact of the explorer as a dialogue initiator during the course of haptic exploration. Second, verbal assistance led to more successful graph comprehension when it was enriched by modifi- ers.

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