2h The Model Human Processor

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A level, A2 IT (Chapter 2) Mind Map on 2h The Model Human Processor, created by Gladys Mba on 12/26/2016.
Gladys Mba
Mind Map by Gladys Mba, updated more than 1 year ago
Gladys Mba
Created by Gladys Mba almost 8 years ago
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Resource summary

2h The Model Human Processor
  1. Portrays user as an information processor
    1. Developed by Card, Moran and Newd
    2. Working memory-RAM
      1. O- Both are limited
        1. X- Computer can hold about 8Gb- 16Gb in RAM whereas humans can only hold about 7 items in working memory
          1. X- Human has to regularly retrieve info from long-term memory making processing much slower than computers.
            1. MEMORY
            2. This model only considers auditory and visual inputs and stores
            3. Longterm memory - Secondary storage
              1. O- Both are non-volatile - Information is kept even after computer is turned off/person goes to sleep.
                1. X- Computers have no difficulty storing or retrieving information from secondary storage
                  1. X- However, humans have to go over and memorise information a lot to store it in long-term memory and have to practice retrieving it from long term memory
                    1. LEARNING
                  2. Humans remember experiences from longterm memory
                  3. Perceptual processors ( sight, touch, hearing) - Inputs
                    1. Perceptual processor receives data from sences and sends it to the working memory.
                      1. At first input it is remains in the form of data and is percieved but not recognised
                        1. User may display initial reaction or a reflex. This can be based of like or dislike
                          1. PERCEPTION
                    2. Cognitive processors (thinking) - CPU
                      1. Cognitive processor- Retrieves data for auditory or image stores => recognises it using information from longterm memory, => sends instruction to motor processor
                        1. The amount of time needed to do this relates to ATTENTION
                        2. CPU- Fetch data from RAM and executes instruction
                        3. Motor processor (talking, typing, moving) - Output
                          1. Motor processor- executes instructions by telling body parts how to act and moving muscles
                            1. User will take time to react
                            2. Output device has their own processors e.g. printers
                            3. Timing
                              1. Perception processor time- Receiving data - (50-200ms)
                                1. Cognitive processor time- recognise and retrieve information and make a decision- (25-170ms)
                                  1. Motor processor time- Acting out decision- (30-100ms)
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