Pedestrian Safety: Time-to-Contact Studies.
Perception of moving objects in desktop and immersive VR to improve pedestrian safety
This work represents newer research.
Each year, thousands of pedestrians are injured or killed in traffic
accidents. Identifying pedestrians' perceptual capabilities for
street crossing decisions is an important problem. We
examine this issue by seeking to understand people's
time-to-contact judgments for short-range to long-range
times-to-contact in a desktop environment.
We conducted two experiments showing
subjects videos of a car moving down a road
toward the viewer. The first experiment observed subjects' ability
to discriminate between two different time-to-contact values. The
second experiment measured subjects' absolute time-to-contact
estimates. We found subjects to be accurate at both discriminating
and estimating time-to-contact in a desktop environment. However,
performance worsens at longer time ranges, those that pedestrians
typically use in street-crossing decisions. Our discrimination
thresholds are consistent with other time-to-contact work, and thus
illustrate that desktop environments are plausible settings to use
for time-to-contact studies.
Students and Collaborators