TY - GEN
T1 - Behavioral characteristics of users with visual impairment in haptically enhanced virtual environments
AU - Liu, Shijing
AU - Bahn, Sangwoo
AU - Choi, Heesun
AU - Nam, Chang S.
PY - 2013
Y1 - 2013
N2 - This study investigated behavioral characteristics of users with visual impairments and tested effect of factors regarding the layout of virtual environments (VEs). Various three-dimensional (3D) VEs were simulated with two different factors: number of objects and layout type (random, symmetric). Using a Novint Falcon haptic device, users with visual impairments were required to complete an object recognition task in 3D VEs with different levels of number of object and layout. The characteristics of their movements (speed, applied force, location, direction, etc.) were recorded, and participants evaluated perceived difficulty after they completed each trial. We analyzed their recorded movements and their rating on perceived difficulty. Results showed that 1) number of objects in 3D VE had significant impact on visually impaired users' behavior; 2) different layout had not showed significant influence on their movement; 3) increased number of objects in 3D VE made the task more difficult; 4) visualized results implied that different users had significant different behavior preference in the same 3D VE. It is expected that the results of this study can improve behavioral understanding of users with visual impairments and guidance for assistive technology development for users with visual impairments.
AB - This study investigated behavioral characteristics of users with visual impairments and tested effect of factors regarding the layout of virtual environments (VEs). Various three-dimensional (3D) VEs were simulated with two different factors: number of objects and layout type (random, symmetric). Using a Novint Falcon haptic device, users with visual impairments were required to complete an object recognition task in 3D VEs with different levels of number of object and layout. The characteristics of their movements (speed, applied force, location, direction, etc.) were recorded, and participants evaluated perceived difficulty after they completed each trial. We analyzed their recorded movements and their rating on perceived difficulty. Results showed that 1) number of objects in 3D VE had significant impact on visually impaired users' behavior; 2) different layout had not showed significant influence on their movement; 3) increased number of objects in 3D VE made the task more difficult; 4) visualized results implied that different users had significant different behavior preference in the same 3D VE. It is expected that the results of this study can improve behavioral understanding of users with visual impairments and guidance for assistive technology development for users with visual impairments.
KW - 3D virtual environment
KW - Haptic
KW - behavioral pattern
UR - http://www.scopus.com/inward/record.url?scp=84880684522&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-39330-3_67
DO - 10.1007/978-3-642-39330-3_67
M3 - Conference contribution
AN - SCOPUS:84880684522
SN - 9783642393297
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 618
EP - 625
BT - Human-Computer Interaction
T2 - 15th International Conference on Human-Computer Interaction, HCI International 2013
Y2 - 21 July 2013 through 26 July 2013
ER -