Lecture Week 4

Question 1

Define Sensation

Answer 1

How the senses pick up information from our environment and transmit them to the brain

Question 2

Define Perception

Answer 2

How the brain organises sensory input and how it interprets sensory information

Question 3

3 basic principles of sensation and perception

Answer 3

1. there is no one-to-one correspondence between physical and psychological reality
2. sensation and perception are active processes.
3. Sensation and perception are adaptive which serves survival and reproduction

Question 4

Vestibular

Answer 4

• relates to sense of balance
• located in the inner ear
• alcohol affects the cerebellum and its ability to communicate with the input from vestibular

Question 5

amplitude

Answer 5

how bright something is

Question 6

purity

Answer 6

how much light is available

Question 7

The Eye Structure

Answer 7

• Cornea
• Pupil
• Retina
• Iris
• Lens (behind Cornea)
• Fovea
• Optic Disk or Optic nerve

Question 8

Cornea

Answer 8

light rays enter the eye here

Question 9

pupil

Answer 9

Opening just behind the cornea

Question 10

iris

Answer 10

Gives eye colour

adjusts the pupil to adjust amount of light

Question 11

lens

Answer 11

behind the pupil

focuses light on to the retina

Question 12

retina

Answer 12

back surface of the eye

• images are focused upside down
• absorbs light
• processes images and sends these images to the brain

Question 13

Focus on the Retina

Answer 13

• Key photoreceptors are divided into rods and cones
• at the back of the retina
• Generally Rods are longer and thin while cones are shorter

Question 14

Fovea

Answer 14

• a small spot in centre of retina
• contains only cones
• greatest visual acuity found here

Question 15

Colour Vision theory

Answer 15

• Trichromatic and Opponent Process both occur
• ## Trichromatic comes first then Opponent Process

Question 16

Trichromacy

Answer 16

• There are three types of cones
• Cones are divided into 3 wavelength
• the wavelength determines what colour we see

Question 17

Colour in Psychological terms

Answer 17

Hue

Question 18

Temporal half of eye

Answer 18

stimuli in left half of eye are distributed to left hemisphere of brain
- some ipsilateral processing

Question 19

How are sound waves produced

Answer 19

• vibrations of molecules that travel through some physical medium such as air
• can also be created by making an action quickly through a chamber such as when clapping

Question 20

Range of human sound

Answer 20

20 Hertz to 20 Kilo Hertz

Question 21

3 Parts of the ear

Answer 21

Outer
Middle
Inner

Question 22

Sound Localisation

Answer 22

The ability to detect where a sound is coming from

Question 23

Proprioception

Answer 23

Proprioception is how your body knows what position it is in. It is the sense that enables us to know where the different parts of our body are, how they are moving, and how much strength our muscles need to use.