Illustrations from: Basic Vision: An Introduction to Visual Perception, by Robert Snowden, Peter Thompson & Tom Troscianko, Oxford University Press (2006) A dyslexic man comes to a Toga party dressed as a goat Finding a needle in a haystack An illusion where the brain perceives movement in large areas of peripheral vision and mistakes it for movement of your head The human brain can turn two dots with a line below them into a human face with expressions Placing prisms over an animal’s eyes turns their vision upside-down. After a time the visual system compensates for the change, and must compensate again when the goggles are removed Bulls are colour-blind and can only see in blue-yellow channels, so can’t distinguish the matador’s red cloth (muleta) from other red or green objects Same Race Effect Whining Suppressor Our senses can only give us a rough idea of specific aspects of the visual world fMRI Probing Eye Movements and Cricket Explosions with shrapnel in the first world war left many people with brain injuries, some received injuries to specific areas and suffered very specific loss of function, indicating the role of that section of the brain Skinnydipping Dons Spotlight of Attention Habituation Muller-Lyre Illusion Emmet’s Law Helmholtz vs Sherrington The selective advantages of the evolution of new photoreceptors in tetrapods – the ability to distinguish objects by reflected spectrum in addition to illumination Those people look like ants from up here’: An ant close up can be the same size on your retina as a person far away Size After Effect Selective pressures can only drive our brains to a certain size before other factors in the balance outweigh the advantages A hypothetical neuron that is associated directly with a complex and specific concept or object Missing the Big Things Short-sighted
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