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Human Information Processing: an introduction Eliza-Nefeli Tsaoussis Outline of the presentation: -Human Information Processing? -Resources -Cognitive load and Skilled performance Where does HIP come from? - A will to optimize HCI -Computer Science meets Cognitive Science: Psychology, Neuroscience, Linguistics, AI, Philosophy Human user models to predict how an interactive system can be used. Study areas -Cognitive process: the sum of psychological functions of the user interacting with a system -Sensation: study of sensory organs' response to stimuli of the system -Perception: interpretation, selection, categorization of stimuli -Motor control: physical response of the user using motor skills Resources -Supply and demand problem Critical and limited resources -Quality and quantity problem Resource limited Vs Data limited tasks - quality of input signal - quality of memory Design solutions? -->Improve data quality and minimize resource consumption Task complexity measure Cognitive load: resource demand WRT learning time, attention level (fatigue, stress), proneness to error... Issues observed: competition between tasks-interference leads to poorer performance While designing: reduce load reduce likelihood of competition improve data Skilled performance -Skills = automatic task performance: less resources needed lighter cognitive load less likelihood of interference allows multiple task performance -Different learning curves: training time and effort. Design dilemma... Design goals -Juggle with resource management and skilled performance: Improve data quality Reduce cognitive load Enhance skill transfer Generate feedback questions?
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