| Term | Definition |
|---|
| Sensation | Translation of physical activity into neural activity |
| Photoreceptors | Rods and Cones - The light-sensitive cells in the retina |
| Rods | very sensitive periphery photoreceptors that have no colour vision. Work well in low light. |
| Cones | exists only in the fovea and have poor sensitivity, excellent acuity and can see colour. |
| Retina processing theorys | Young Helmhotz trichromatic theory and opponent process theory. |
| Young Helmhotz Theory | Each cone has preferred wavelenght of light to which it responds the most. Outside this wavelenght it responds very little if at all. |
| Opponent Process theory | Colours come in pairs EG red-green, blue-yellow, black-white. when looking at one solid coulour for prolonged period the cells which respond to that colour become fatigued resulting in seeing the opposite colour when looking away. |
| 3 stages of shape perception | Edge detection, perceptual organisation & creating depth. |
| binocular depth perception | Each eye sees a slightly different version of the same image, the closer the image the greater the disparity. |
| Monocular cues | Linear perspective and texture gradient - depth perception |
| Distal stimulus | A physical object in the world distant from the observer |
| Proximal Stimulus | Image formed on the retina - flat/without depth. |
| Perceptual interpretation | "guessing" the stimulus from the proximal stimulus. |
| classical perspective | Distal, proximal and perceptual stimulus. |
| Neural Perspective | Ventral stream identifys what objects are and the dorsal stream identifys location and names the object. |
| neural principles of vision | Shape, orientation, motion, colour and identity. |
Combine with other sets
Share on Facebook
Share on MySpace