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Perception

GCSE Psychology 1
by

Laurie Johnston

on 23 May 2013

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Transcript of Perception

What colour are the squares? What shape is this door? What colour are the squares? Definitions Describe 3 types of visual constancy (2 marks each) Task Who is the tallest? Who is the tallest? Visual constancy is the ability to recognize that an object remains the same even when it produces different images on the retina (it looks different)

There are 3 types of visual constancy
Size
Shape
Colour Visual constancies Our perception of objects is far more constant or stable than the images that reaches our eye.


The images coming into our eyes change with the movement of the eyes, the head and our position, together with changing light.


If we relied only on retinal images for visual perception we would always be:
conscious of people growing physically bigger when they came closer,
objects changing their shapes whenever we moved, and
colours changing with every shift in lighting conditions Keeping the world constant Who is the tallest? What shape is this door? We see the world with our brain Colour constancy makes sure we don't realise/notice that squares A and B have the same colour. What colour are the squares? a door appears to change shape as it is opened. Shape constancy ensures that we are not typically conscious of this What shape is this door? Under normal conditions we know that the tiny people, cars, and buildings we see at a great distance are not miniatures, but appear small because they are far away – this is size constancy. Who is the tallest? How do we see our world? All will learn about how the eye and the retina works - Grade C
All will learn about the blind spot and where visual information is used in the brain - Grade C Time to read:

Yasmine, Malyun, Anya, Lequesha On your white board define:
Perception
Retina
Rods
Cones
Optic Nerve Now the questions on page 5 We'll read again: Lequesha, Anya, Malyun, Yasmine On your whiteboards: Define:
blindspot
optic chiasma
visual cortex Questions page 7 Homework: find out about monocular and binocular depth cues for next week's class Progress and exit check On your whiteboards:

What is vision?
What is perception?
What would disturb your vision - a bump on the back or the front of your head? Why?
Why do we have a blind spot?
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