Chater 14 Flashcards
Perception
The process in which the brain interprets sensory information
Sensation
The process where our sense organs or receptors receive information from the environment and transmit it to the brain
Absolute threshold
The minimum amount of physical energy needed for an observer to perceive a visual stimulus in ideal conditions, 50 percent of the time
Aqueous humour
Clear fluid that helps the cornea keep its rounded shape
Cornea
Clear converting the iris and pupil and helps protect it
What part of the eye does light bend through
Cornea
Iris
A muscle that controls how much light enters the eye
Pupil
A hole that lets light into the inner eye
Retina
The layer of light sensitive cells called rods and cones at the back of the eye. It’s connected to the brain by the optic nerve
Blind spot
The place where the optic nerve leaves the retina, there is no light sensitive cells
Optic nerve
The bundle of fivers that carry information from the retina to the brain
3 stages of sensation
Reception- stimulus energy is collected by the sense organ
Transduction- energy is converted by receptor cells into electrochemical nerve impulses.
Transmission- send the nerve impulses to the primary sensory cortex
3 stages of perception
Selection- pick out the ones that are important to us and pay attention to those
Organisation- information is reorganised so that we can make sense of it
Interpretation- past experiences and values are involved in the process where stimulus is given meaning
Rods 3 facts
Responsible for vision in low light
Can only register black and whit
Can’t register detail
Cones 3 facts
Responsible for vision of detail
Responsible for colour vision
Require high levels of light
