Visual Mechanisms of Intermediate Distance Space Perception During Self-motion
University of Louisville
Summary
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.
Description
Every day human subjects rely on their vision to judge the absolute distances of objects around them to plan and guide their actions, such as walking and driving. This, way-finding, process of ascertaining one's position and planning for possible routes of actions cannot be accomplished without reliable perception of visual space in the intermediate distance range (\~2-25m from the observer). Thus, the broad long-term objective of this project is to uncover the mechanisms underlying intermediate distance space perception that supports distance judgment. Yet, less is known about the underlying…
Eligibility
- Age range
- 18–40 years
- Sex
- All
- Healthy volunteers
- Yes
Inclusion Criteria: * 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). Exclusion Criteria: * 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.
Interventions
- OtherVisual Stimuli for Space Perception
The 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.
Location
- University of LouisvilleLouisville, Kentucky