Perception and Visual Cognition

Question 1

How do we measure perception by absolute threshold?

Answer 1

Finding the smallest amount of stimuli to feel stimuli- dimmest light you can see

Question 2

What are difference thresholds?

Answer 2

The smallest difference between two stimuli a person can detect

Question 3

What is phototransduction?

Answer 3

Photoreceptors turning light into energy. Energy goes to bipolar cells and then to ganglion cells.

Question 4

What is the duplex theory?

Answer 4

Rods are used more in night vision, cones are used more in day vision.

Question 5

What is the transduction of the ear (How does it work)?

Answer 5

Sound waves vibrate the eardrum, ossicles transfer and amplify the vibrations, vibrations are picked up by hair cells and sent to auditory nerve

Question 6

What are the senses to hair in mechanoreceptors?

Answer 6

Light touch to hair– Basket cells. Light touch without hair– Meissner corpuscles

Question 7

What is the Young-Helmholtz theory?

Answer 7

Trichromacy– three cone receptors: long, medium, small. Red-Lots of long. Blue-lots of Small. Yellow- Even Long and Medium

Question 8

What is the opponent-process theory?

Answer 8

Long, medium, and small cone outputs put into six primaries: Red, Blue, Yellow, Green, Black, White

Question 9

What is Synesthesia

Answer 9

A merging of the senses– getting a taste in mouth after hearing word or seeing color