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Added proper citation for the development of MHP by Card, Moran, & Newell – published in The Psychology of Human-Computer Interaction, 1983 |
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'''Human processor model''' or MHP (Model Human Processor<ref name=":0">{{Cite book|url=https://www.worldcat.org/oclc/9042220|title=The psychology of human-computer interaction|last=K.|first=Card, Stuart|date=1983|publisher=L. Erlbaum Associates|others=Moran, Thomas P., Newell, Allen.|isbn=9780898592436|___location=Hillsdale, N.J.|oclc=9042220}}</ref>) is a cognitive modeling method developed by [[Stuart K. Card]], [[Thomas P. Moran]], & [[Allen Newell]] (1983) used to calculate how long it takes to perform a certain task. Other cognitive modeling methods include parallel design, [[GOMS]], and [[KLM (human-computer interaction)]].
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The standard definition for MHP is: The MHP draws an analogy between the processing and storage areas of a computer, with the perceptual, motor, cognitive and memory areas of the computer user.
The human processor model uses the cognitive, perceptual, and motor processors along with the visual image, working memory, and long term memory storages. A diagram is shown below. Each processor has a cycle time and each memory has a decay time. These values are also included below. By following the connections diagrammed below, along with the associated cycle or decay times, the time it takes a user to perform a certain task can be calculated. Studies into this field were initially done by [[Stuart K. Card]], [[Thomas P. Moran]], & [[Allen Newell]] in 1983<ref name=":0" />. Current studies in the field include work to distinguish process times in older adults by Tiffany Jastrembski and Neil Charness (2007).
== How To Calculate ==
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