Computer Science – Human-Computer Interaction
Scientific paper
2007-09-04
Dans Proceedings of ACM Working Conference on Advanced Visual Interfaces - ACM Working Conference on Advanced Visual Interface
Computer Science
Human-Computer Interaction
4 pages
Scientific paper
Input multimodality combining speech and hand gestures has motivated numerous usability studies. Contrastingly, issues relating to the design and ergonomic evaluation of multimodal output messages combining speech with visual modalities have not yet been addressed extensively. The experimental study presented here addresses one of these issues. Its aim is to assess the actual efficiency and usability of oral system messages including brief spatial information for helping users to locate objects on crowded displays rapidly. Target presentation mode, scene spatial structure and task difficulty were chosen as independent variables. Two conditions were defined: the visual target presentation mode (VP condition) and the multimodal target presentation mode (MP condition). Each participant carried out two blocks of visual search tasks (120 tasks per block, and one block per condition). Scene target presentation mode, scene structure and task difficulty were found to be significant factors. Multimodal target presentation proved to be more efficient than visual target presentation. In addition, participants expressed very positive judgments on multimodal target presentations which were preferred to visual presentations by a majority of participants. Besides, the contribution of spatial messages to visual search speed and accuracy was influenced by scene spatial structure and task difficulty: (i) messages improved search efficiency to a lesser extent for 2D array layouts than for some other symmetrical layouts, although the use of 2D arrays for displaying pictures is currently prevailing; (ii) message usefulness increased with task difficulty. Most of these results are statistically significant.
Carbonell Noëlle
Kieffer Suzanne
No associations
LandOfFree
Oral messages improve visual search does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Oral messages improve visual search, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oral messages improve visual search will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-414602