Sensation and Perception

Question 1

Sensation

Answer 1

Bottom-up (data driven)

Question 2

Perception

Answer 2

Top-down processing

Question 3

Absolute Threshold of Sensation

Answer 3

Minimum amount of stimulation needed to sense a signal 50% of the time

Question 4

Signal Detection Theory

Answer 4

Model to predict how and when a person will detect a stimulus in relation to context

Question 5

Sensory Adaptation

Answer 5

Reduction to sensitivity of a stimulus after constant exposure to it

Question 6

Difference Threshold

Answer 6

Smallest amount two stimuli can differ for an individual to perceive them as different

Question 7

Weber’s Law

Answer 7

It’s not the amount that changes, it’s the percent that changes that matters
Size of the just noticeable difference is a constant proportion of the initial stimulus value

Question 8

Wavelength/Frequency

Answer 8

Determines hue
Short wavelengths = High frequency (Bluish)
Long wavelengths = Low frequency (Reddish)

Question 9

Amplitude

Answer 9

Determines intensity of colors
Great amplitude = Bright colors
Small amplitude = Dull colors

Question 10

Rods

Answer 10

Detect light — function best in dark (see in blues)

Way more rods than cones

Question 11

Cones

Answer 11

How we see in color
Do not function in dark
Less cones and are in periphery
Help with visual acuity

Question 12

Helmnitz Trichromatic Theory

Answer 12

Red, blue, and green are the 3 primary colors

Question 13

Opponent-Process Theory

Answer 13

4 primary colors (blue, green, red, yellow)

While one color is being reflected the opposite is being absorbed

Question 14

Parallel Processing

Answer 14

Simultaneously process incoming stimuli of differing quality