TEST2_Udacity_Unit2 Flashcards
GOMS
GOALS
OPERATORS
METHODS
SELECTION Rules
GomsWeakness
doesn’t address complexity
Assumes the user is expert
Stregths-GOMS
Formalize user interaction- measure time and efficiency
Types of GOMS
Vanilla GOMS
KLM GOMS- Key stroke level model
CMN GOMS-Card ,moran newell- Hierarchial GOMS
NGOMSL- structured natural langiuage notation
Tips of GOMS
Focus on small goals NEST goals Diffrentiate descriptive and prescriptive- will do Costs to operators- How long Trim waste-
Cognitive task analysis
Underlying thought process while performing a task
Cognitive task analysis _predictor model
Collecting preliminary knowldege Identify knowledge representation Focused knowldege elicitation Analyse and verify data required Format the results to be applied
Hierarchial task analysis
breaking down to smaller task
Congnitive task analysis strengths
Emphazise mental processes
Formal for interface design
Congnitive task analysis weakness
Time intensive
demphasize context
ill suited for novices
Other tasks analysis -GOMS
KLM - Keystroke Leve Model TLM-Touch level model MHP- Model Human processor CPM-GOMS NGOMSL
Other tasks analysis -Cognitive
Critical Decision Method-CDM Task Knowledge structures-TKS Cognitive Function Model-CFM Applied CTA Skill Based CTA
Cognitive load
Remembering certain things helps cognitive load
Cockpit remembers speed
Sequence of changes to be made for different speeds .
This shoul happen quickly
Booklet - long-term memory
Teh small page is pinned
The speeds are remembered on the pedometer using speed bucks working memory
Deliberation- distributed across the pilots
Distributed cognition
Artifacts share the cognitive load and help in the short term memory