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ACM Transactions on Applied Perception (TAP), Volume 3 Issue 2, April 06

Simultaneous measurement of steering performance and perceived heading on a curving path
Jonathan W. Kelly, Andrew C. Beall, Jack M. Loomis, Roy S. Smith, Kristen L. Macuga
Pages: 83-94
DOI: 10.1145/1141897.1141898
The ability to judge heading (direction of travel) has been the focus of much research, but a role for perceived heading in steering has not been firmly established. Subjects steered down a road consisting of straight and curved segments and made...

Perceived quality of compressed stereoscopic images: Effects of symmetric and asymmetric JPEG coding and camera separation
Pieter Seuntiens, Lydia Meesters, Wijnand Ijsselsteijn
Pages: 95-109
DOI: 10.1145/1141897.1141899
JPEG compression of the left and right components of a stereo image pair is a way to save valuable bandwidth when transmitting stereoscopic images. This paper presents results on the effects of camera-base distance (B) and JPEG coding on overall...

Evaluation of spatial displays for navigation without sight
James R. Marston, Jack M. Loomis, Roberta L. Klatzky, Reginald G. Golledge, Ethan L. Smith
Pages: 110-124
DOI: 10.1145/1141897.1141900
We report on two route guidance tasks using a highly accurate GPS receiver. Eight participants who were visually impaired or blind traveled two routes, one on a city sidewalk, and one in a city park. We tested and compared two types of spatial output...

Haptic discrimination of force direction and the influence of visual information
Federico Barbagli, Ken Salisbury, Cristy Ho, Charles Spence, Hong Z. Tan
Pages: 125-135
DOI: 10.1145/1141897.1141901
Despite a wealth of literature on discrimination thresholds for displacement, force magnitude, stiffness, and viscosity, there is currently a lack of data on our ability to discriminate force directions. Such data are needed in designing haptic...

An application of eyegaze tracking for designing radiologists' workstations: Insights for comparative visual search tasks
M. Stella Atkins, Adrian Moise, Robert Rohling
Pages: 136-151
DOI: 10.1145/1141897.1141902
The goal of this research is to use eyegaze tracking data to provide insights into designing radiology workstations. We designed a look-alike radiology task with artificial stimuli. The task involved a comparative visual search of two side-by-side...