si688f09-Week5-MentalModelsMetaphor

si688f09-Week5-MentalModelsMetaphor - Mental Models,...

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Mental Models, Metaphor, Intelligibility Mark W. Newman SI 688 October 12, 2009
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Mental Models What is a “mental model”? Compelling intuition people have internal representations of how the world operates Difficult to formalize A “runnable” simulation A predictive theory A depiction of a problem space An analogous representation of an external situation
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A Useful Definition for HCI A set of beliefs about how a system works “When I hit Cmd-S, the system will save my document.” “The system gets slow sometimes, I just need to wait a bit and try again.” “If I’m not seeing the updates I expect, I need to hit the ‘Refresh’ button.”
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Incorrect Mental Models Homer tries telecommuting http://www.hulu.com/watch/19900/the-simpsons-any-
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Folk Theories How does air freshener work? “Captures” the stink molecules “Blocks” the stink “Freshens” your fabric Actual: release a stronger, more pleasant odor
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Computing Folk Theories & Superstitions My superstitions In WH 311: Only connect to projector AFTER everything else is set up Reboot when computer starts behaving erratically Don’t be the first to upgrade Wait for Service Pack 2
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Norman’s Models Design Model: What the designer has in mind System Image: What the system actually embodies User’s Model: What the user believes
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Norman’s Models Design Model: What the designer has in mind System Image: What the system actually embodies User’s Model: What the user believes Design shortcomings Misunderstandings
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This note was uploaded on 12/16/2009 for the course SI 688 taught by Professor Staff during the Fall '08 term at University of Michigan.

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si688f09-Week5-MentalModelsMetaphor - Mental Models,...

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