Verbally assisted haptic graph comprehension The role of taking initiative in a joint activity

Deniz, Ozan
Mehmetcan, Fal
Acartürk, Cengiz
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 is facilitated by audio and verbal assistance. We investigate the circumstances under 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 aspects of verbal assistance for haptic graph comprehension, as indicated by post-exploration sketch production of the participants: First, the results revealed 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 modifiers.
2nd European and the 5th Nordic Symposium on Multimodal Communication


Towards designing audio assistance for comprehending haptic graphs A multimodal perspective
DENİZ, OZAN; MEHMETCAN, FAL; Acartürk, Cengiz (2013-07-31)
Statistical graphs, such as line graphs are widely used in multimodal communication settings. Language accompanies graphs and humans produce gestures during the course of communication. For visually impaired people, haptic-audio interfaces provide perceptual access to graphical representations. The local and sequential character of haptic perception introduces limitations in haptic perception of hard-to-encode information, which can be resolved by providing audio assistance. In this article we first present...
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Deniz, Ozan; Mehmetcan, Fal; Acartürk, Cengiz (null; 2013-06-30)
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Haptic exploration patterns in virtual line graph comprehension
DENİZ, OZAN; MEHMETCAN, FAL; Acartürk, Cengiz (2015-08-07)
Multi-modal interfaces that provide haptic access to statistical line graphs combined with verbal assistance are proposed as an effective tool to fulfill the needs of visually impaired people. Graphs do not only present data, they also provide and elicit the extraction of second order entities (such as maxima or trends), which are closely linked to shape properties of the graphs. In an experimental study, we investigated collaborative joint activities between haptic explorers of graphs and verbal assistants...
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Citation Formats
O. Deniz, F. Mehmetcan, and C. Acartürk, “Verbally assisted haptic graph comprehension The role of taking initiative in a joint activity,” presented at the 2nd European and the 5th Nordic Symposium on Multimodal Communication, Estonya, 2014, Accessed: 00, 2021. [Online]. Available: