Posted: Jan 11, 2019 9:27 am
by newolder
I’m not trained in neuroscience but the analysis I can bring is from a history of looking at signals containing a mixture of noise and data.

What I suspect happens with this illusion is that when the observer’s head remains still, the noise of the bars overwhelms the signal of the shaded shape such that it remains below the detection threshold of brain processes and the shape is not observed. However, when the observer shakes their head, new signal process pathways kick-in that damp out the moving bars and consequently, reveal the hidden shape.

The illusion of an absence of a shape is removed from another perspective.

There are many other optical illusions that show things that are not there, like for example illusions of motion where everything is, in fact, stationary.

As a side note: In physics there is the proposed phenomenon of Unruh radiation where a population of particles (photons) is observed in an accelerating reference frame that simply don’t exist to an inertial observer - a merry-go-round if ever there was!

Lack of belief in something could easily be a product of ignorance. Many believed, for example, that all swans were white until antipodean black swans were observed.

Belief in god(s) is/was often attributed to ignorance - "God only knows." I lack belief that god(s) exist beyond ideas in some human brains like I lack belief that Sherlock Holmes lived and breathed in London.

ETA: In light on Cito's comment below - I know of 0 cases where god(s) are a product of knowledge since they are often defined to exist beyond the reach of empiricism. Knowledge without empiricism - laugh all the way to the bank they do. :coffee: