TY - GEN
T1 - Investigating Feedback for Two-Handed Exploration of Digital Maps Without Vision
AU - Bardot, Sandra
AU - Serrano, Marcos
AU - Perrault, Simon
AU - Zhao, Shengdong
AU - Jouffrais, Christophe
PY - 2019/8/29
Y1 - 2019/8/29
N2 - Digital Interactive Maps on touch surfaces are a convenient alternative to physical raised-line maps for users with visual impairments. To compensate for the absence of passive tactile information, they provide vibrotactile and auditory feedback. However, this feedback is ambiguous when using multiple fingers since users may not identify which finger triggered it. To address this issue, we explored the use of bilateral feedback, i.e. collocated with each hand, for two-handed map exploration. We first introduced a design space of feedback for two-handed interaction combining two dimensions: spatial location (unilateral vs. bilateral feedback) and similarity (same vs. different feedback). We implemented four techniques resulting from our design space, using one or two smartwatches worn on the wrist (unilateral vs. bilateral feedback respectively). A first study with fifteen blindfolded participants showed that bilateral feedback outperformed unilateral feedback and that feedback similarity has little influence on exploration performance. Then we did a second study with twelve users with visual impairments, which confirmed the advantage of two-handed vs. one-handed exploration, and of bilateral vs. unilateral feedback. The results also bring to light the impact of feedback on exploration strategies. © IFIP International Federation for Information Processing 2019.
AB - Digital Interactive Maps on touch surfaces are a convenient alternative to physical raised-line maps for users with visual impairments. To compensate for the absence of passive tactile information, they provide vibrotactile and auditory feedback. However, this feedback is ambiguous when using multiple fingers since users may not identify which finger triggered it. To address this issue, we explored the use of bilateral feedback, i.e. collocated with each hand, for two-handed map exploration. We first introduced a design space of feedback for two-handed interaction combining two dimensions: spatial location (unilateral vs. bilateral feedback) and similarity (same vs. different feedback). We implemented four techniques resulting from our design space, using one or two smartwatches worn on the wrist (unilateral vs. bilateral feedback respectively). A first study with fifteen blindfolded participants showed that bilateral feedback outperformed unilateral feedback and that feedback similarity has little influence on exploration performance. Then we did a second study with twelve users with visual impairments, which confirmed the advantage of two-handed vs. one-handed exploration, and of bilateral vs. unilateral feedback. The results also bring to light the impact of feedback on exploration strategies. © IFIP International Federation for Information Processing 2019.
KW - Accessibility
KW - Map exploration
KW - Multimodal feedback
KW - Smartwatches
KW - Users with visual impairment
KW - Wearable devices
UR - http://www.scopus.com/inward/record.url?scp=85072873509&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85072873509&origin=recordpage
U2 - 10.1007/978-3-030-29381-9_19
DO - 10.1007/978-3-030-29381-9_19
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 978-3-030-29380-2
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 305
EP - 324
BT - Human-Computer Interaction – INTERACT 2019
PB - Springer, Cham
T2 - 17th IFIP TC13 International Conference on Human-Computer Interaction, INTERACT 2019
Y2 - 2 September 2019 through 6 September 2019
ER -