HCI 3 (Cognitive Processing)

• Perception
• Attention
• Memory
• Learning
• Language
• Problem Solving

• Experiential Cognition
• Reflective Cognition

• > circumstances
• correct action is not obviously signalled by the system
• we dont have a memorised rule that applies for the current situation/goal (lack of proceduralised knowledge)

• >problem solving
• extrapolating from existing knowledge (memory systems)
• may be simple, e.g. making a decison
• logical reasoning might supply answer
• mental models may predict outcome
• reasoning my analogy/metaophor is powerful and natural

• MHP (Model Human Processor)
• De Norman 7 stage model

• models information processes of user interacting with the computer
• predict cognitive processes involved
• enables calculation of predicted time to complete tasks

• limitations
• - based on modelling mental activities that happen exlusively inside the head
• - does not addequately account for how people interact with computers/devices in the real world

• logical reasoning (we are bad at it)
• decision making
• confirmation bias

• hick-hyman law
• 

• knowledge can be described knowledge as mental model/conceptual model:
• - how to use system (what to do next)
• - what to do with unfamiliar systems / unexpected sitations (how the system works)
• 

people use mental models for inferences (heating example)

it takes into account that cognition is spread across people, places, interface and representations (e.g. air plane carrier)