Sensation and Perception (1) Flashcards
Sensation, Perception, vision
What is Sensation?
process by which our sensory organs respond to external stimuli from the environment.
Elements of sensation
Energy
receptor cells
transduction
What is perception?
It’s how we make sense of the raw sensory information that comes in
What are the sensory thresholds?
Absolute threshold
Difference threshold
What is the absolute threshold?
the minimum level of something we need to notice it.
what is the difference threshold?
the smallest amount of change needed for us to notice a difference in something.
Vision
how our brain makes sense of what we see using our eyes.
Parts of the visual system
Cornea
lens
pupil
iris
retina
fovea
optic nerve
blind spot
Where does light enter in the eye?
Cornea
what is created in the retina?
Neural impulses created by receptor cells, rods and cones
What do rods do?
responsible for vision in low light, essential for seeing in the dark, also highly sensitive to light but unable to distinguish color well
where are rods located?
the peripheral regions of the retina
what do cones do?
responsible for color vision and vision sharpness (visual acuity), also less sensitive to light and capable of detecting different colors
How many types of cones are there and what are they?
3, red, green and blue
Where are cones located?
the central part of the retina, the fovea
