1. S&P what’s left?

2. Viewing the World in Color!
Color solid
wavelength (hue)
amplitude (brightness)
purity (saturation)
2 Mixtures:
Subtractive Color Mixing – removing some wavelengths, leaving less light than was originally there.
Additive Color Mixing – superimposing lights

3. Color Theories Opponent Process Theory of Color Vision
Trichromatic Theory of Color Vision
Human eye has 3 types of receptors sensitive to red, green, blue (primary colors).
Color Blindness – inability to distinguish among colors.
Dichromats – people who make do with only 2 types of receptors.
Opponent Process Theory of Color Vision
Color perception depends on receptors that make opposite responses to 3 pairs of colors.
Red vs green, yellow vs blue, black vs white.
Complementary Colors –produce gray tones when mixed.
Afterimage – a visual image that persists after a stimulus is removed.

4. Visual Cues
Binocular cues - clues about distance based on differing views of the two eyes (3D movies)
Retinal Disparity - objects within 25 feet project images to slightly different locations on the right & left retinas, so they see different views of the object.
Convergence - Seeing the eyes converging toward one another as they focus on closer objects.

5. Monocular Depth Cue-Clue about distance based on the image in either eye alone (Pictorial Cues)
Motion Parallax - we view objects that are closer to us as moving faster than objects that are further away from us
Ex.

6. Change Blindness
a change in a visual stimulus is introduced and the observer does not notice it.
Ex.

7. Visual Cliff (1960s experiment)
Depth perception was considered innate and note learned behavior
Ex.

8. Perceptual Constancies in Vision
Perceptual Constancy – Tendency to experience a stable perception in the face of continually changing sensory input.

9. Sound
Conduction Deafness – Often explained by a lack of sound wave conduction related to the eardrum or ossicles.
Sound Localization – a listener's ability to identify the location or origin of a detected sound in direction and distance. See image