Visual Perception Research Focused Lecture

Question 1

What is our perceptual experience a creation of?

Answer 1

Our brain

Question 2

What has Brindley and Lewin found?

Answer 2

• Conducted an experiment with a blind person

- They stimulated his brain for him to construct representation of a person who isn’t blind would be able to construct.

Question 3

What are methods of studying perception?

Answer 3

1. Psychophysics
2. Anatomy
3. Electrophysiology

Question 4

What is an example of psychophysics?

Answer 4

-Presenting a stimuli and measuring Particpants response

Testing to see how people can see certain patterns such as degrading patterns. And then measuring detection thresholds to see if patterns differ.

Question 5

How do we use Anatomy to test perception?

Answer 5

Testing what aspects of the brain are responsible for certain functions.

Question 6

How do we use electrophysiology to investigate perception.

Answer 6

• Firing rate of neuron or an axon is measured as the visual stimulus is changed.
• measure activity of large volumes of Neurons: fMRI, EEG. (Useful to find out what large structures of the brain are responsible for)

Question 7

What phenomenon displays a interplay between psychophysics and electrophysiology?

Answer 7

Mach band

Question 8

What is the Mach band and how does it display and effect of psychophysics?

Answer 8

It is an illusion

-it displays a line that does not exist. The physical intensity of the luminance in the picture is constant between the dark and light area.

Question 9

What is Hermann Grid?

Answer 9

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