The Royal Victoria Hospital.
The Montreal General Hospital
The Royal Victoria Hospital.
The Montreal General Hospital
Kingdom, F. A. A., Baldwin, A. S., Schmidtmann, G. (2015) Modeling probability and additive summation for detection across multiple mechanisms under the assumptions of signal detection theory. Journal of Vision, Vol.15, 1. doi:10.1167/15.5.1 PDF
Schmidtmann, G., Logan, A.J., Kennedy, G.J., Gordon, G.E. Loffler, G. (2015), Distinct lower visual field preference for object shape. Journal of Vision (2015) 15(5):18, 1–15 PDF
Hint: Both towers are identical.
Marouane Ouhnana created this dynamic version of the famous Leaning-Tower Illusion. (Kingdom, F. A. A., Yoonessi, A. & Gheorghiu, E. (2007). The Leaning Tower illusion: a new illusion of perspective. Perception, 36, 475-477.)
All lines are straight and the background is a uniform grey (Schmidtmann & Jennings, 2014).
Blink or move your eyes over the pattern and it will "hopefully" appear to wobble.
(Schmidtmann & Jennings, 2014)