Mental models

Question 1

Mental Models Structural and Functional

Answer 1

Structural: surrogate, held by experts, hard to maintain
Functional: task-action, less expensive to aquire and maintain, represents connection between user goals and required actions

Question 2

Mental Models Begriffe

Answer 2

Target System: Actual system
Conceptual Model: Accurate and complete model of the system
System image: user interface of the system
Users mental model: internal representation of user

Question 3

Capturing mental models

Answer 3

Qualitative studies: interviews, reports, text analysis, drawing exercise
Quantitive studies: Quiz, Survey

Question 4

Functional vs Structural what connections

Answer 4

Structural makes connections between building blocks
Basic: Some things are missing
Complete: Nothing is missing

Question 5

Metaphors problems?

Answer 5

User has to find out which thing actually relate and which do not

Question 6

Working with metaphors

Answer 6

Normal documentation: Not using metaphors
Documentation with metaphors: Using simple metaphors for some things toolkit locks key seal imprint
Complete Narrative: Introducing a narrative to bring across
Short Narrative: Using bigger metaphor but not introducing every single thing

Metaphor + Concise documentation better

Question 7

Metaphor Evaluation Matrix

Answer 7

Describes overlap of what is described of metaphor and what the system does.
Metaphor describes something that system does not do => Very undesirable

Question 8

Conclusion Mental Model

Answer 8

Threats need to be included in mental model, influencing mental models is hard, they are error prone