Transcript Vision - AP Psychology

Transduction
Conversion of one form of
energy to another.
How is this important when studying
sensation?
Stimulus energies to neural impulses.
For example:
Light energy to vision.
Chemical energy to smell and taste.
Sound waves to sound.
Vision
We only use light energy to see.
What makes up a light wave?
Wavelength
• The distance from the peak of
one light wave to the peak of the
next.
•The distance determines the hue
(color) of the light we perceive.
Intensity
The amount of energy in a light wave.
Determined by the height of the wave.
The higher the wave the more intense
the light is.
Structure of the Eye
Nearsighted Vision
Farsighted Vision
The Retina
Feature Detection
The concept that specific nerve cells in the brain
respond to specific features of the stimulus, such
as shape angle or movement.
Parallel Processing
• The processing of several aspects of a
problem simultaneously.
Color
Motion
Form
Depth
How do we see in color?
What color is this dragon?
Color
• The dragon is anything but red.
• The dragon rejects the long
wavelengths of light that to us are
red- so red is reflected of and we see
it.
• Also, light has no real color.
• It is our mind that perceives the color.
Two major color theories
Young-Helmholtz Trichromatic
(three color) Theory
• Realized that any color can be created by
combining the light waves of three primary
color•So they guessed that we have 3 different
types of receptor cells in our eyes. Together
they can pick any combination of our 7 million
color variations.
•Most colorblind people simply lack cone receptor
cells for one or more of these primary colors.
Opponent-Process Theory
• We cannot see certain colors together in
combination (red-green, blue-yellow, and
white-black). These are antagonist/
opponent colors.
Tube and marble example.