Q#1: What is RSI?
Answer: Repetitive Strain Injury (RSI) occurs when tendons controlling finger movement become inflamed due to repeated strain.
Ref: Handouts
Q#2: Define three features of Chord Keyboard
Answer:
- Useful where space is limited
- Can be used when one hand is busy
- Used in mail sorting and court transcription
Q#3: Define Task
Answer: Operations to manipulate concepts of a domain. Example: Drawing a geometric shape in graphic design.
Q#4: Define Keyboard Types
- QWERTY Keyboard: Standard layout from left to right in top row: Q-W-E-R-T-Y.
- Alphabetic Keyboard: Letters arranged alphabetically; slower for trained typists.
- Dvorak Keyboard: Layout based on frequency of letters; most common letters on home row for efficiency.
Q#5: What is Real Affordance?
Answer: Physical objects with perceptually obvious uses, e.g., a handle that invites grasping.
Q#6: Characteristics of Interactive Design
- Early focus on users & tasks
- Empirical measurement
- Iterative design
Q#7: Phases involved in development process
- Research
- User & domain modeling
- Requirements (user, business, technical)
- Framework (design structure & flow)
- Refinement (behavior, form)
Q#8: Model involving risk analysis and prototyping
Answer: Spiral Lifecycle Model – iterative framework with repeated evaluation and prototyping.
Q#9: Flaws of Waterfall Model
- Requirements change over time but waterfall freezes them.
- Sequence: Requirements → Design → Code → Test → Maintenance
Q#10: Design Outcomes
- Visibility
- Affordance
- Constraints
- Mapping
- Consistency
- Feedback
Q#11: Important in user conceptual model
Answer: The user’s conceptual model must be clear and substantial; all other elements subordinate to it.
Q#12: Problems of Speech Input
- Only works in constrained tasks
- Prone to mistakes in similar-sounding words
- Interference from background noise
- Natural language hard for computers to interpret
Q#13: Display device that is cheap and fast
Answer: CRT – cheap, fast response, supports rapid animation & high color capability
Q#14: Define Goal & Example
Answer: Desired output of a task. Example: Producing a solid red triangle on canvas.
Q#15: Difference between Mental Model & Conceptual Model
- Conceptual Model: Designer’s representation to make system understandable.
- Mental Model: User’s internal representation to guide actions in current/future situations.
Q#16: Commonly used keyboard type
Answer: QWERTY Keyboard
Q#17: Explain Perceiving the State of World
Answer: Users interpret system state via visible cues and feedback to understand results of actions.
Q#18: Two aspects of usability
- Effectiveness: How well system achieves intended tasks.
- Efficiency: How easily users can perform tasks.
- Safety: Protects users from hazards or errors.
Q#19: Types of Persona
- Primary
- Secondary
- Supplemental
- Customer
- Served
- Negative