Chapter Review Flashcards
Function: sense receptors
-convert energy from stimulus into electrical impulses that travel along nerves to the brain
What types of codes account for separate sensations?
- anatomical codes
- functional codes
Psychophysics studies…
- sensory sensitivity by measuring…
- absolute thresholds
- difference thresholds
Signal-detection theory states…
- responses in a detection task consist of both:
- sensory process
- decision process
Sensory adaptation occurs…
-when sensation is unchanging
Sensory deprivation occurs…
-with too little stimulation
We use selective attention to…
-avoid sensory overload
Inattentional blindness is…
-failure to consciously perceive something you are looking at because you are not attending to it
The stimulus for vision is…
-light
How does light travel?
-in waves
What produces experiences of hue?
-wavelength of light
What produces experience of brightness?
-intensity of light
What produces experience of saturation?
-complexity of light
Where are visual receptors located?
-retina
Where do signals from the visual receptors go?
-to ganglion cells, whose axons are connected to the optic nerve
What is responsible for vision in dim light?
-rods
What is responsible for color vision?
-cones
What is the process of dark adaptation?
-rods and cones take time to adjust to dim illuminations
Feature-detector cells…
-in the visual areas of the brain detect specific aspects of the environment
Some researchers believe we have certain brain cells that make up a…
-face module
Trichromatic theory…
- accounts for 1st level of color processing in the retina
- 3 types of cones respond to different wavelengths of light
Opponent-process thoery,
- 2nd level of color processing in cells in retina and thalamus
- respond in opposite fashion to short and long wavelengths of light