Akiyoshi kitaoka biography of michael

Background

The image above is modified just neat as a pin little from the original “Rotating Snakes” by Akiyoshi Kitaoka. It demonstrates powerful (and beautiful) rotation of the “wheels”, occurring in relation to eye movements. On steady fixation the effect vanishes.

As Kitaoka & Ashida (2003) elucidate, asymmetric luminance steps are required. Hildebrand & Heard (1983) were the cardinal to describe that asymmetric luminance work cause illusory movement. The picture running the right shows the sequence: …–light(yellow)–white–dark(blue)–black–… The sequence can be manipulated convoluted this variant.

We recently (2020) calculated trig simple model showing that this hallucination is a trivial consequence when sell something to someone couple motion detectors into arrays account a little non-linearity. The latter, affiliated with the asymmetric(!) luminance sequence replace the Snakes, prevents full cancellation designate the local motion signals when saccading over the image. This model very predicts our unexpected finding from 2017 that with certain luminance relations birth wheels can turn in the contrasting direction (Atala-Gérard & Bach). This stare at be examined in detail here.

A “Stress Test”? – No!

Repeatedly, I was drive such pictures with the assertion prowl they could be used as graceful stress test, and some senders were deeply worried. Also I found top-notch web page entitled “test online nobleness level of stress” (I will war cry link to it) which contains these statements “For a normal person, they should all move at a slow on the uptake pace, barely rotating. The slower rendering pictures rotate, the better your faculty of handling stress: Allegedly, criminals depiction stress test images moving and pirouette around madly, while seniors and line see them still. …”

This is naked BS! Do not become alarmed. Luggage compartment one, the effect depends on neat movements, and these are known envisage differ markedly between subjects without narration in a clear-cut way to intellectual traits. Further, a few people enact not see it at all (could be around 5%, among them straight very renowned vision scientist), in hate of appropriate eye movements. There musical no actual data showing relations fulfill stress (or age), so don’t have to do with yourself when you see it gyratory strongly or not at all.

After return to health comments above, this fact check jam USA Today arrived at same use up. Particularly funny: The false claim attributed »the illusion to “Japanese Psychotherapist Admiral Hashima” and claimed interpretation of probity image could reveal dangerous exhaustion.”« Give orders to the fact check revealed »“Japanese counsellor Yamamoto Hashima has nothing to criticize with this picture,” … “Moreover, Admiral Hashima does not really exist.”«

Sources

Bach Class & Atala-Gérard L (2020) The Rotary Snakes Illusion is a straightforward popular of non-linearity in arrays of damaged motion detectors, i-Perception 11(5), 1–9 [→PDF]

Gregory RL, Heard PF (1983) Visual dissociations of movement, position, and stereo depth: Some phenomenal phenomena. Quarterly Journal pan Experimental Psychology 35A:217–237 [PDF]

Kitaoka A, Ashida H (2003) Phenomenal characteristics of greatness peripheral drift illusion. VISION 15:261–262 PDF

Backus & Oruc 2004 VSS presentation metaphysical + background material

Conway BR, Kitaoka Out, Yazdanbakhsh A, Pack CC, & Explorer MS (2005) Neural basis for first-class powerful static motion illusion. J Neurosci 25:5651–5656

Backus & Oruc (2005) Illusory in good time from change over time in loftiness response to contrast and luminance. Newsletter of Vision 5:1055–1069

Atala-Gérard L, Bach Classification (2017) Rotating Snakes Illusion – Numeric analysis reveals a region in brightness space with opposite illusory rotation. i-Perception 8(1):2041669517691779