The brain is mainly an image processing system

The more I think about it, I believe the brain is primarily an image processing system....that is built on pattern recognition. Even when it's processing abstract symbols (read more from Gilberto de Paiva on this) it organizes around semantic patterns, visual patterns, logical patterns. Even emotional and behavioral patterns enable us to read and interpret a situation. Pattern recognition is what enables us to ignore or summarize most of the daily visual stimulation.

While spending 5 weeks in the trees at the Yaddo artist colony in January and February this year -- it was interesting to note the absence of signage and logos ever present in urban spaces. I got to thinking about little language, images, symbols were present even 150 years ago. Unlikely the human brain has evolved much in just a half dozen generations....so how are we managing to process everything on our laptops, shopping trips and daily commute?

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More on neuroaesthetics

Art and mathematics are fundamentally concerned with the representation of the surrounding world. They struggle to express by abstraction the general behind the specific....and establish what's essential and relevant. Human minds satisfy the basic human urge to find patterns....at all levels, from molecular to societal. Jaime Gomez and Sarah Belden -- "Mapping new Neural Pathways"

ESF exploratory workshop, Milan Sept09

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Why do you like what you like

I've been rolling around this notion in my mind, that beauty is connected to the familiar in your brain. There is a complex set of connections formed early and build through a lifetime. I hypothesize that you can trigger neurons in a sequence that feel familiar and are also unconsciously comforting.....and thus pleasing. Maybe the connection in the brain is about 'fluency'. This makes total sense to me.

Article written in 2004 by Rolf Reber, Norbert Schwartz, and Piotr Winkielman entitled Processing Fluency and Aesthetic Pleasure: Is Beauty in the Perceiver’s Processing Experience? -- they write that aesthetic pleasure is a function of the viewers brain processing.... "the more fluently perceivers can process an object, the more positive their aesthetic response."

Steve Genco (love him) boils this down in a post and writes....

"The idea of processing fluency is deceptively simple. Things that are easier to process cognitively are perceived as more aesthetically pleasing than things that are harder to process.

Unexpected fluency tends to produce more subjective experience than expected fluency:

  • Identical patterns are rated more favorably when presented with vertical rather than horizontal symmetry (Palmer, 1991)
  • High contrast enhances liking for patterns shown briefly, but not for identical patterns shown longer (R. Reber & Schwarz, 2001)
  • Objectively identical stimuli are evaluated more favorably when their processing is facilitated through priming procedures (R. Reber et al., 1998; Winkielman & Fazendeiro, 2003)
  • Repeated exposure to a stimulus results in more favorable evaluations, a phenomenon known as the mere exposure effect (Zajonc, 1968, 1998)
  • Prototypical forms are preferred over nonprototypical forms (Martindale, 1994)
  • People prefer “average” stimuli (Rhodes & Tremewan, 1996).
  • Stimulus complexity is often related to preference by an inverted Ushaped function (e.g., Berlyne, 1971; Vitz, 1966).

  • According to the discrepancy-attribution hypothesis (Whittlesea & Williams, 1998, 2000), fluency associated with processing a certain event is more likely to elicit a subjective experience (pleasure, familiarity, etc.) if the fluency is unexpected in light of the person’s processing expectations, which constitute a “norm” for the event (Kahneman & Miller, 1986).

    With low levels of complexity, the source of fluency is very salient. As complexity increases, the salience of the source of perceptual fluency decreases, enhancing the misattribution of fluency to beauty. However, further increases in complexity will eventually reduce processing fluency, leading to a decrease in perceived beauty. These mechanisms would combine to form a U-shaped relation between complexity and beauty, as predicted and found by Berlyne (1971)."

    Art that targets the inner mind

    What does art look like that targets the inner mind....not the flat, literal renderings of physical brains...but work that tries to feel what is inside your head....look like?  A show at the Drawing Center in 2005 of Agnes Martin, Emma Kunz and Hilma af Klint is the best example of work that uses abstraction as a means to connect cognitive powers, the process of life and visual art. Emma Kunz envisioned art as healing -- which is a powerful idea.  That something visual could trigger your brain chemistry to affect your body.....like a drug.  What if she's not wrong? (Emma Kunz n.d. approx 1930)

    Jerry Saltz wrote a beautiful review of the show, about Martin he wrote...."To look at her work is to know what meditation feels like. Many of her early paintings and drawings come on like thunderstorms from across transcendental valleys. The sereneThis Rain (1960) looks like a Buddhist test pattern from the planet Rothko." (Agnes Martin 1963)

    Evidence of non-conscious processing

    Non-conscious processing exists. Watch the video -- stay til the end. Click here... Derren Brown -- Subliminal Advertising with explanation There is another video with different people, slightly different campaign, but the explanation is not quite as clear, I liked this one better.

    Subliminal messages hit your brain and are processed when you need them. Crazy, huh?

    If you consider the amount of words and images you encounter in a day, ad guys say it's over 5000 ad messages, and pile on all the other stuff you drive by, walk by, and surf by...it's positively bombarding that 'hunter-gatherer human brain' of yours. 150 years ago you would have seen a few signs in shop windows, maybe pick up a book, read a newspaper....don't you wonder where it's all going? How much can you absorb in a day?

    Your brain doesn't have arms, legs and toes

    With all the flurry of articles about brain-scans - fMRIs, there's a great article about the fallacy of overintrepreting the lit areas of a scan. Your brain isn't made up of nodes or specific locations for specific activities. It's not like your brain has a spot for looking at a painting, or making a deodorant buying decision...even though research is testing those things, and looking for what 'lights-up' when you engage in such an activity. Scientific American - Five ways brains scans mislead us

    (you can read the whole article here, sorry Scientific American, you charge $7.95 to get the full article and I found a pdf for free for you...it's worth a look)

    I contend it's still very early days, and the fascination of fMRI testing is in full force. My favorite analogy of all I've read is that memory is more the bits in a blender -- the picture of that is so compelling and vivid. In this article Michael Shermer he makes a clear case for why the brain is more akin to a network, and offers good skepticism about applying too much pop-science to brain scans.