HCI Test 1 Flashcards
(44 cards)
When to use observation
Know users’ behavior in real life
When users’ behavior is observable
Understand context of user activity
Cautions in Observation
(1) Get permissions from users first
(2) Be aware of heavy logging workload
(3) Separate what you saw (behavior) and what you think (comments)
Types of quantitative analysis
(1) Descriptive results
(2) Regression analysis
(3) ANOVA
Descriptive results in data analysis
%, confidence interval, SD
Regression analysis in data analysis
using scores in a questionnaire to predict user satisfaction
ANOVA
measures the effects of factors on UI usages and preferences from questionnaire results or observations
Type of Qualitative analysis
Coding
Coding
Convert verbal and other qualitative information into digits
2 Coding methods
(1) with multiple evaluators and (2) with software
With multiple evaluators (coding)…
you have to invite at least two to code same results, training is needed, check their consistency
How to evaluate coding results
Correlation (correlation coefficient). Coefficient should be positivew and greater than .6, otherwise inconsistency between 2 evaluators
Coding software
(1) Coding analysis toolkit (CAT)
(2) RQDA
(3) WEFT QDA
(4) Stories Matter
(5) Compendium
Cost of bad design
(1) Performance and safety problems for users
(2) Customer/user give up the function
(3) Additional customer/user support
(4) User dissatisfaction -> reputation and lower market share
Why study HCI
(1) improve human performance, optimize workload and aesthetics
(2) bring new style of life
First track ball
Tom Cranston
First mouse
Douglas Engelbart
Usability Engineer job
(1) Development of prototypes and user interaction models
(2) Usability evaluation and testing
(3) User interface mock-ups
(4) Statistics and exp design
(5) Writing and communication skils
HCI Journals
- ACM Transactions on Computer-Human Interaction
- IEEE Transactions on Systems, Man, and Cybernetics
- IEEE Transactions on Intelligent Transportation Systems
- International Journal of Human-Computer Studies
- Behavior & Information Technology
- Applied Ergonomics
- Human Factors
- Ergonomics
Another name for semantic network
Experience
What can we learn from affordance movie (bank robber)
People follow naturalistic behavior
Other basic design principles
(1) Consistency in terminology, colors fonts
(2) Shorcuts
(3) Dialogues to yield closure (sequences of actions clearly organized with beginning, middle, end)
(4) Error prevention, and management
(5) Easy reversal of actions (error tolerance)
(6) Internal locus of control
(7) Reduce working memory load
Another design principle
Stimulus-response compatibility (stove-top pictures)
Methods to describe users
(1) Market Segmentation
(2) Persona
Methods to “know” users
(1) Questionnaire
(2) Interview
(3) Focus Group
(4) Observation
(5) Data analysis for those methods
