Intermediate Visual Space Perception
ConditionVision
Trial statusRecruiting
Trial phaseNot applicable
Trial typeInterventional
Biological sexAll
Age18-40
SponsorUniversity of Louisville
About this trial
The ability to judge the locations of various objects from oneself during self-motion in the intermediate distance range (\~2-25m) is crucial for successful performance of activities of daily living, such as walking and driving. However, little is known about the mechanisms of visual space perception involved in judging distance, the focus of this project, in the planning and/or execution of self-motion in the natural 3D environment. The theoretical knowledge to be gained from this project will contribute to the scientific literature and provide insights into how eye and neurological defects could impair visual space perception, wayfinding, and mobility.
Eligibility criteria
This trial accepts healthy volunteersQualifiers
Adults (up to 40 years of age)
Children (18 years and older)
Normal, or corrected-to-normal, visual acuity (at least 20/20)
Stereo acuity (<20 arc sec).
Disqualifiers
Self-reported history of visual and eye diseases
Physical movement restrictions.
Vulnerable populations such as pregnant women will be excluded owing to the extensive time commitment required of the subjects.
Trial design
Design model
Single group
Treatments tested in this trial
Visual Stimuli for Space Perception
Other interventionThe visual environment (e.g., target locations and texture backgrounds) will be varied and human behavioral responses (judged distances) will be measured to reveal the space perception and cognitive processes underlying space perception and navigation.
Treatment groups
180 Participants
are divided into 1 treatment groupGroup A: Visual scencesExperimental treatment 1 intervention
Trial outcomes
Primary outcomes
1
Visual mechanisms of intermediate distance space perception (distance) before and after self-motion
Subjects will judge perceived distances (cm) of test targets from themselves before self-motion to establish a baseline measure. Subjects will then undergo self-motion for an average of 10 sec, and stop at a predetermined location. Then subjects will again judge the perceived distance (cm) of test targets after the self-motion. The change in perceived distance (cm) from baseline will reveal if their perception is affected by environmental factors, internal perceptual process and/or cognitive process.
Time frame
During procedure, an average of 10 sec.2
Visual mechanisms of intermediate distance space perception (height) before and after self-motion.
Subjects will judge perceived heights (cm) of test targets relative to the floor or ceiling before self-motion to establish a baseline measure. Subjects will then undergo self-motion for an average of 10 sec, and stop at a predetermined location. Then subjects will again judge the perceived height (cm) of test targets after the self-motion. The change in perceived height (cm) from baseline will reveal if their perception is affected by environmental factors, internal perceptual process and/or cognitive process.
Time frame
Druing procedure, an average of 10 sec.Sponsors and contacts
Click on the lead sponsor to view all of their trials.
University of Louisville
Lead sponsor
National Eye Institute (NEI)
Collaborator
Source ClinicalTrials.gov