Exam 2 Flashcards
The act of organizing and interpreting sensory experience. It is how our psychological world represents our physical world.
Perception
Is the stimulation of our sense organs by the outer world.
Sensation
Our sensitivity diminishes when we have constant stimulation. This ensures that we notice changes in stimulation more than stimulation itself.
Sensory adaption
The sense organs convert physical stimuli into neural impulses. This conversion of physical into neural information is called ____________
Transduction
The lowest intensity level of a stimulus we can detect half of the time
Absolute threshold
The smallest amount of change between two stimuli that a person can detect half of the time.
Difference threshold
A thin layer of nerve tissue that lines the back of the eye
Retina
Photoreceptors that function in low illumination and play a key role in night vision; responsive to dark and light contrast
Rods
Photoreceptors that’s are responsible for color vision and are most functional in conditions of bright light
Cones
A spot on the back of the retina that contains the highest concentration of cones in the retina; place of clearest vision
Fovea
The structure that sits behind the pupil;it bends the light rays that enter the eye to focus images on the retina
Lens
The muscle that forms the colored part of the eye; it adjusts the pupil to regulate the amount of light that enters the eye
Iris
The point at which strands of the optic nerve from half of each eye cross over to the opposite side of the brain
Optic chiasm
Three types of cones in human color vision:
Blue (short)
Green (medium)
Yellow-red (long)
When an image moves across the retina
Perceiving motion
