sensation and attention

Question 1

SENSATION

Answer 1

is the initial detection and processing of stimuli

Question 2

sensation stages

Answer 2

1. Reception - Presence of physical stimuli detected by sensory neurons in sense
   organs
2. Transduction - Different forms of stimuli converted into electrochemical energy
3. Transmission - energy transferred to brain for processing

Question 3

PERCEPTION

Answer 3

• interpreting messages and takes place when the brain receives information, is organised and given meaning

Question 4

perception stages

Answer 4

1. Selection
2. Organisation
3. Interpretation

Question 5

attention types

Answer 5

selected, divided, habituation, dishabituation

Question 6

SELECTED

Answer 6

• totally aware and focused on what we have selected to pay attention to
• oblivious to other things when in a highly focused state

Question 7

DIVIDED

Answer 7

• Lets us do two things at the same time

- If task is complex, one of the activities usually suffers

Question 8

HABITUATION

Answer 8

• decrease in attention when a stimulus is repeated

- eg. Unaware of traffic noises if living by a busy road

Question 9

DISHABITUATION

Answer 9

• renewal of attention when there is a change to the stimulus.
• eg. Screeching of brakes

Question 10

electrical activity of the brain

Answer 10

• Recorded on an electroencephalograph (EEG)
• Four brain patterns associated with the different states of consciousness are -
  alpha, beta, theta, delta

Question 11

galvanic skin response

Answer 11

electrical conductivity of the skin

• Measured by attaching electrodes to hair-free parts of the skin
• Electrical current passes more easily through wet skin instead of dry