Summary: According to researchers, taller people are better at correctly identifying the location of targets in their middle distance vision.
Source: Ohio State University.
Tall quarterbacks might have more going for them than a clear view over the offensive line.
New research shows that tall people are better than shorter people at correctly identifying the location of targets in their middle-distance vision – between three and 20 meters away. (In football, that would be about three to 22 yards away.)
And that visual superiority holds true even when tall people sit down and their shorter counterparts stand on a box or stool, found a first-of-its-kind study.
The research supports the idea that with height comes better spatial relations, said study author Teng Leng Ooi, a professor of optometry at The Ohio State University. The study appears today in the journal Science Advances.
“Maybe taller athletes have advantages on the field, especially in sports such as tennis and football,” she said.The study could point to advantages for taller people in certain situations, Ooi said.
Spatial relations are a person’s ability to place something in relation to the other objects around it. Our eyes alone aren’t sufficient to adequately assess the space around us. And researchers believe that the brain makes up for the eyes’ deficits by applying built-in knowledge for determining where things are in that space, Ooi said. That becomes even more important in the dark, when we don’t have as many visual clues.
To test participants’ ability to judge the location of a target, the researchers had the 24 subjects (12 short, 12 tall) predict distance in three different settings: full light; a pitch-black room with a green LED “target” light at a distance; and in darkness with dimly lit red LED markers either on the floor or on the ceiling as a reference.
In the dark experiments, after a study participant saw the target, the researchers removed the green light and asked the subject to walk to and point out the target location.
The tall subjects weren’t perfectly accurate, but they fared much better overall than the short participants when it came to assessing the location of targets that were farther away.
“That could be because they’ve spent a lifetime of looking at the ground from a higher vantage point,” Ooi said.
Taller people have a better perspective of the ground: For example, if you’re looking at two traffic cones (one directly in front of the other) about 50 feet away, the distance between the two will be more apparent from a 6-foot eye height than from a 4-foot eye height.
Because of this, Ooi and her collaborators predicted that taller people would more accurately perceive the space between themselves and a target in the distance. And they wondered if the tall people would outdo their shorter counterparts even in the dark, because of an implicit knowledge of where objects are in space.
Researchers have long favored the theory that people rely most heavily on the ground to help them determine the distance of an object in their intermediate vision, Ooi said, and this study supports that.
The ground is likely our preferred reference because it tends to have visual texture that helps us to perceive space, she said.
“To have accurate space perception, the ground surface is very important,” Ooi said. “We are really reliant on the ground – we don’t float, we don’t fly, so maybe through evolution our brains have taken this factor into account.”
To further test the theory that our brains are hard-wired for predicting the correct location of an object, the researchers switched up the eye height advantage of their test subjects.
When the tall people sat down and the short people stood on a box, the tall people still excelled at determining the distance of a visual target.
The researchers also found – as expected – that people both short and tall were more accurate when they had visual cues (those dimly lit red LED markers) on the floor as opposed to the ceiling.
The jury’s out on whether a short person who always wears high heels or drivers who choose SUVs over compact cars gain visual benefit, Ooi said.
“It’s possible we adapt. We aren’t there scientifically, but that’s a natural question.”
Ooi worked on the study with Liu Zhou of East China Normal University and Zijiang J. He of the University of Louisville.
Funding: The research was supported by the National Institutes of Health.
Source: Teng Leng Ooi – Ohio State University
Image Source: This NeuroscienceNews.com image is adapted from the OSU press release.
Original Research: Full open access research for “Intrinsic spatial knowledge about terrestrial ecology favors the tall for judging distance” by Liu Zhou, Teng Leng Ooi and Zijiang J. He1 in Science Advances. Published online August 31 2016 doi:10.1126/sciadv.1501070
[cbtabs][cbtab title=”MLA”]Ohio State University. “Taller People Have a Built In Advantage When it Comes to Spatial Relations.” NeuroscienceNews. NeuroscienceNews, 1 September 2016.
<https://neurosciencenews.com/height-spatial-relation-neuroscience-4949/>.[/cbtab][cbtab title=”APA”]Ohio State University. (2016, September 1). Taller People Have a Built In Advantage When it Comes to Spatial Relations. NeuroscienceNews. Retrieved September 1, 2016 from https://neurosciencenews.com/height-spatial-relation-neuroscience-4949/[/cbtab][cbtab title=”Chicago”]Ohio State University. “Taller People Have a Built In Advantage When it Comes to Spatial Relations.” https://neurosciencenews.com/height-spatial-relation-neuroscience-4949/ (accessed September 1, 2016).[/cbtab][/cbtabs]
Intrinsic spatial knowledge about terrestrial ecology favors the tall for judging distance
Our sense of vision reliably directs and guides our everyday actions, such as reaching and walking. This ability is especially fascinating because the optical images of natural scenes that project into our eyes are insufficient to adequately form a perceptual space. It has been proposed that the brain makes up for this inadequacy by using its intrinsic spatial knowledge. However, it is unclear what constitutes intrinsic spatial knowledge and how it is acquired. We investigated this question and showed evidence of an ecological basis, which uses the statistical spatial relationship between the observer and the terrestrial environment, namely, the ground surface. We found that in dark and reduced-cue environments where intrinsic knowledge has a greater contribution, perceived target location is more accurate when referenced to the ground than to the ceiling. Furthermore, taller observers more accurately localized the target. Superior performance was also observed in the full-cue environment, even when we compensated for the observers’ heights by having the taller observer sit on a chair and the shorter observers stand on a box. Although fascinating, this finding dovetails with the prediction of the ecological hypothesis for intrinsic spatial knowledge. It suggests that an individual’s accumulated lifetime experiences of being tall and his or her constant interactions with ground-based objects not only determine intrinsic spatial knowledge but also endow him or her with an advantage in spatial ability in the intermediate distance range.
“Intrinsic spatial knowledge about terrestrial ecology favors the tall for judging distance” by Liu Zhou, Teng Leng Ooi and Zijiang J. He1 in Science Advances. Published online August 31 2016 doi:10.1126/sciadv.1501070