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HCI Revision (task analysis (HTA (Goals, tasks, hierachis of goals and…
HCI Revision
task analysis
data collection
verbal protocols
questionaries
structured interviews
levels of analysis
macro
environment
micro
cognition
intermediate
task
HTA
Goals
tasks
hierachis of goals and subgoals
stopping rules
representation of analysis
GOMS
goals
operations
methods
selection rules
Ergonomic checklists
interface surveys
labelling surveys
enviromental surveys
walkthrough approaches
cognitive walkthrough
user analysis
requirements gathering
direct obsveration
indirect observation
user population
interesting characterisics
age
sex
physical limitations
education
IT knowledge
personae
very detailed
not real person
new idea
stakeholders
e.g. managers
interface specification
includes
layout
behaviour
state changes
error messages
usage scenarios
Specification Vs Prototyping
description of physical interface
description of interaction
prototyping
represent
task
user
system
types
paper
low fidelity
easy to set up
interaction not real
slide show
high fidelity
e.g. visual basic
good simulation
limited representation
horizontal
longer to build
give users scope for making mistakes
vertical
one part of system fully implemented
full
lots of time coding
rarely used
HCI software process