Psychology vision and perception

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Perception
the way the brain makes sense of the visual image detected by the brain
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Retina
the light-sensitive layer at the back of the eye. It is made up f nerve cells called rods and cones
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Rods
light-sensitive cells in the retina that respond even in dim light.
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Cones
light-sensitive cells in the retina that can detect colour.
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Optic nerve
bundle of nerves that leads out from the retina at the back of the eye. It carries information from the rods and cones to the brain
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Blind spot
the area of the retina where the optic nerve leaves. It has no rods or cones and so cannot detect light
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Optic chiasma
the cross-shape where some of the information from the left and right eye crosses over to pass into the opposite side of the brain
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Visual cortex
the area at the back of the brain that interprets visual information
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Difference between vision and perception
vision is the biological process of seeing and perception is the psychological process of making sense of the image
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What the visual cortex does
allows us to understand shapes and distances and fills in the gap left by the blind spot in each eye
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Depth cues
the visual 'clues' that we use to understand depth or distance
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Monocular depth cues (examples)
information about distance that comes rfrom one eye, such as superimposition, relative size, texture gradient, linear perspective and height in the plane
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Binocular depth cues
information about distance that needs two eyes, such as stereopsis
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Size consistency
we percieve an object as the same size even when its distance from us changes
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Relative size
smaller objects are perceived as further away than larger ones
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Texture gradient
an area with a detailed pattern perceived to be nearer than one with less detail
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Height in the plane
objects closer to the horizon are perceived to be more distant than ones below or above the horizon
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Superimposition
a partly hidden object must be further away than the object covering it
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Linear perspective
parallel lines appear to converge (meet) in the distance
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Stereopsis
a binocular depth cue. The greater the difference between the view seen by the left eye and the right eye, the closer the viewer is looking
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Other cards in this set

Card 2

Front

the light-sensitive layer at the back of the eye. It is made up f nerve cells called rods and cones

Back

Retina

Card 3

Front

light-sensitive cells in the retina that respond even in dim light.

Back

Preview of the back of card 3

Card 4

Front

light-sensitive cells in the retina that can detect colour.

Back

Preview of the back of card 4

Card 5

Front

bundle of nerves that leads out from the retina at the back of the eye. It carries information from the rods and cones to the brain

Back

Preview of the back of card 5
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