Chapter 4

Question 1

The absolute Threshold

Answer 1

The absolute threshold is the minimum amount of stimulus energy for the person to perceive the stimulus. In ideal conditions 50% of the time.

Question 2

Transduction

Answer 2

stimulus energy is converted by receptor cells into electrochemical nerve impulses.

Question 3

Transmission

Answer 3

Receptor cells send nerve impulses to the primary sensory cortex. Where special receptor cells start the process of perception.

Question 4

Selection

Answer 4

our brain picks out the most important stimuli

Question 5

Organisation

Answer 5

the information reaches the brain and is organised so that our brain can make sense of it

Question 6

Sensation

Answer 6

The process of our sensory organ receiving information from the environment and sending to the relevant part of the brain

Question 7

Reception

Answer 7

applies to the visible light spectrum - light goes through our eye and is focused on the retina. The retina contains photoreceptors which are made up of rods and cones. Phot receptors are responsible for picking up visual stimuli. stimulus energy is received by the eye.

Question 8

3 stages of sensation

Answer 8

Reception, Transduction and Transmission

Question 9

Rods

Answer 9

Rods are sensitive to black and wight

Question 10

Cones

Answer 10

sensitive towards colour

Question 11

transduction

Answer 11

which involves photoreceptors and receptive fields - once the light is turned into electrochemical impulses, allowing the visual information to travel along the optic nerve to the brain. The optic nerve communicates information from the eyes to the occipital lobe. When your retina identifies visual stimuli it passes it on through the rods and cones to bipolar cells and then to the retinal ganglion cell.

Question 12

Perception

Answer 12

there are three stages to perception - selection, organisation and interpretation

Question 13

Transmission

Answer 13

takes place in the visual cortex of the brain - sends nerve impulses along the optic nerve to the primary visual cortex in the occipital lobes where receptor cells respond through the process of visual perception.

Question 14

Selection

Answer 14

selects what stimuli is important to focus on. The image is broken up by a special receptor called a feature detector, which respond to a manner of different lines.

Question 15

Organisation

Answer 15

our visual cortex recognises information so we can make sense of it. It travels along two pathways to the temporal lobe - to identify the object and the parietal lobe to judge where it is situated

Question 16

Interpretation

Answer 16

visual stimuli is given meaning. The temporal lobe identifies the stimulus by comparing incoming information with previous information.

Question 17

Reception and light energy

Answer 17

the process of light entering our eyes is important in interpreting the visual stimuli.