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19 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is sensation? |
Process through which the senses pick up visual/auditory sensory stimuli & transmit them to the brain |
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What is perception? |
Process by which sensory info in constructively organised & interpreted by brain |
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What are sensory receptors? |
Specialised cells in sense organs that detect and respond to sensory stimuli and convert them to neural impulses |
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What is transduction? |
Process by which receptors concert sensory stimulation to neural impulses |
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What is the Retina? |
A layer of tissue at the back of the eye that contains sensory receptors of vision & onto which incoming image is projected by lens |
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What are rods? |
Light sensitive receptors that let us have vision in black/white/fray in dim light. Mostly in periphery and the vision isn't very sharp |
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What are cones? |
Enable vision in Color and fine detail in adequate light. mostly in fovea |
Sharp vision |
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What's the fovea? |
Small area at center of Regina and it's the point of central focus. Has rods but no cones. Gives us the clearest sharpest vision. |
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What's the trichromatic theory? |
3 types of cones sensitive to red/green/blue & that varying levels of activity in the receptors make the colours we can see |
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What's the opponent-process theory? |
3 types of cells that work in opposition. Each type is sensitive to a given pair of colors: red/green, yellow/blue. When one member pair is activated the other is inhibited. |
Why we dont have reddish greens |
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What are occlusions in the visual field |
Retinal structures, blind spot, environmental occlusions/omissions |
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Why do we have perception? |
Gets a meaningful whole from parts. Rapid understanding with minimal effort |
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How does perception work? |
Use expectation from context and previous experience |
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What's bottom up processing? |
Analyzing the components of sensory info |
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What's feature analysis |
IDing the various components that the sensory info comprises by specialised areas of the visual cortex |
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What's top down processing? |
Make meaning of sensory info by fitting it to what you know |
Expectations, past experience, motivations. Imposing order |
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What's the Gestalt rules of organising? |
Similarity and proximity; Closure and simplicity |
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Why do we have top down processing? |
Helps us to understand sensory info more efficiently |
Quickly make sense of a lot of info not get overwhelmed |
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Can top down processing lead us astray and why? |
Yes-- perceiving what we expect rather than what's accurate |
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