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UMD CMSC 434 - Human Information Processor

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Questions?• Project #2Human Information Processor(Card, Moran, Newell)Put it together: Are A and B letters?Put it together: Fitts’ law (tapping task)DSHick’s law• Cost of taking a decisionScope and Caveats• Only a model• Focus on low level phenomenon– Can be dwarfed by other considerations• Learning,• Compatibility• Questions?Learning(“Learning and memory” Anderson)• Power law of learningProblem solvingWriting booksManual skillStages of skill acquisition(“Learning and memory” Anderson)Example: Using a manual transmission• Cognitive– Verbal representation of knowledge• Associative– Proceduralization• From rehearsal to recognition• Autonomous– More and more automated– Faster and faster– No cognitive involvement• Difficult to describe what to doProblem solving• Hobbits and Orcs crossing a river– What is the difficult step?• Problem solving Framework– States–Goals– Operators• Difference reduction• Sub-goaling– SearchImplications: confirmation steps• Pros and Cons?• See also “The humane interface” Raskin, p23Implications: dynamic menus• Pros and


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