Visual Perception SAC Flashcards
What happens in reception?
Light enters the eye through the cornea-then passes through the pupil. The lens focuses the light on the retina which contains the photoreceptors aka light sensitive cells called rods and cones.
What are cones?
The photoreceptors proving clear vision in colour
What are rods?
Photoreceptors providing peripheral vision in black and white
What are the six stages of Sensation and Perception
Reception Transduction Transmission Selection Organisation Interpretation
What is transduction?
It’s where the electromagnetic energy is converted by the rods and cones into electrochemical impulses. This allows the visual info to travel along the fibres of the optic nerve to the brain
What is transmission?
Rods & cones send nerve impulses along the optic nerve to primary visual cortex in the occipital lobes
What is selection?
Image is broken up by feature detectors. Found in the optic nerve and the primary visual cortex.
What is organisation?
Visual info reaches the brain Uses the principles: Perceptual constancies Gestalt principles Depth cues
Once this happens it travels along two pathways, gets to the temporal lobe to identify the object and then the partial lobe to judge where the object is in space
What is Interpretation?
Where visual stimulus is given meaning
What is perceptual set?
Readiness to perceive something in accordance with what we except it to be
Several factors can influence perceptual set, what are they?
Context
Motivation
Emotion
More info on context?
refers to the setting or environment in which a perception is made
More info on motivation?
Misinterpretation of words due to not seeing what we want to see
Eg. On a long drive, reading ‘fuel ahead’ as ‘food ahead’ if you’re hungry
More info on emotion
Our emotional state could influence the way in which we perceive visual information
What was the Bruner and Mintern experiment?
The Bruner and Mintern experiment involved two groups. Group 1 receiving a number of random numbers and group 2 receiving assorted letters. They were showed a stimulus after these were shown. The results showed that 92% of group 1 said the visual stimulus was a B and 83% of group 2 said the visual stimulus was a 13.
