model human processor and time scales Flashcards
perception
gain information from the world via sensors
cognition
processes new information based on current knowledge
gains new knowledge and makes decisions
motor action
how we output information into the world
e.g. speaking
model human processor
basic facts about how humans process information and how much time we need to do it
what makes up the perceptual system
perceptual memory
processor
sensory organ
what does the perceptual system do
transforms external events into a form that the cognitive system can process (raw data -> symbolic data)
acts as a buffer for sensory data and for each one incoming stimuli are stored for a short time
what is the recognition time for visual and audio data
visual; 200ms
audio; 1500ms
why is there a difference between the recognition time for visual and audio data
sentences are longer so you need more time for them to make sense
audio disappears quicker and is often not repeated
what is the typical cycle time for perceptual processing
100ms
10 clicks /s
what happens when events occur faster than the perceptual system can compute them
they become integrated
e.g. 2 short stimuli is stored as one at twice the intensity
what is part of the cognitive system
long term memory
cognitive processor
working memory
what does the cognitive system do
processes received information and decides how to act on it
works on symbolic information not raw data
how long does the recognise-act cycle take
70ms
what happens in the recognise-act cycle
recognise; activates associations stored in long term memory
act; decided what to do next and modifies the working memory
uncertainty principle
decision time increases with the uncertainty about the judgement to be made
