Knowledge Representation & Mental Models (ACS)

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Knowledge Representation & Mental Models

Knowledge in Head vs World

Retrievability, Learning, Efficieny of use, ease of use at first encounter, Aesthetics

Either can be representated graphically or textually

e.g on a map.The museum is located here: DecalrativeTo get there you need to take a right..go up 3 blocks, next left then its on the corner: Procedural

Imageability supports remembering and reasoning

Pin number

Procedural

Unconcious

typing, driving etc

Means-end reasoning

Processes, procedures

Declarative

Know that: concepts, relationships, things & actions

Examples

Tap

users model: water coming out, temperature, pressure

Designers model has 2 seperate water supplies mixed

Norman

System Image

User model

Designers Model

internal representation of how a system works

Transferred from mental models of smilair objects

Incomplete

Constructed from experience

Simulated

concrete