Great point, parallax in something like synthetic or inferential
pseudo-dimensions. And it speaks directly to the variation in structure and
processing just in front of and just behind the sensors.
Similar to owl hearing, I've heard octopuses dedicate ~70% of brain tissue to
vision and we dedicate ~30%. But our eyes have higher receptor density, color
vision, and depth perception. Plus the more integrated V2-6 processing goes
kinda deep into our brain, if I understand correctly. Both up- (feathers, eye
spacing, etc.) and down-stream (whole lobes vs. deep integration) processing
should be part of any composition from objective stuff like light or sound to
obtuse stuff like thoughts or behaviors. If McGilchrist weren't so heavily
relying on the left-/right-brain metaphor, there are plenty of abductive
targets to go for in things like the built environment, information overload,
dopamine release, meritocracy, grifting, etc.
E.g. The decoding the gurus guys interviewed the authors of this paper recently:
Is Visual Perception WEIRD? The Müller-Lyer Illusion and the Cultural Byproduct
Hypothesis
https://perception.jhu.edu/files/PDFs/25_MullerLyer/AmirFirestone_MullerLyer_2025_PsychReview.pdf
I haven't read the paper, yet. But the opportunities for variation (or the lack
thereof) are plentiful. And it just seems preemptive to focus so hard on
bicameral brains.
On 7/14/25 1:33 PM, Santafe wrote:
On Jul 15, 2025, at 2:41, glen <[email protected]> wrote:
Now, I'm sensitive to the argument that all this falls under parallax, even
radially symmetric body types and the 9 octopus ganglia. And bi- vision,
hearing, etc. is a simple form of parallax: triangulation.
When I was a kid, there was some article (maybe Sci. Am.?) that I found
wonderful.
It had to do with owl ear asymmetries, which are produced by tufts of stiff
feathers at unequal positions in front of whatever feather-hood (or something)
channels sound to the ear canals.
Upshot of the articles was that owls need resolution in the vertical as well as
the horizontal, from phase, intensity, and packet-arrival-time differences
(including what acousticians term the “head-shaped transfer function”, as I
learned some decades later working among the acousticians for a few years).
Article claimed (I have no way to check without a dive to see what has been
done since) that owls and people have about the same acuity in lateral position
of a sound’s origin, if the sound has enough shape (so, not a clarinet) to cue
from. But people have terrible vertical acuity. For owls, the vertical acuity
is ballpark-comparable to the lateral.
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