Process for Selecting Heuristic Evaluation Principles 1. Start by looking at a Traditional Heuristic Evaluation (HE) 2. Explore how standard HE principles can relate to street design for everyday cycling (Nielsen)* 3. Search Lidwell’s Universal Principles of Design for principles that best apply to street design 4. Aggregate most relevant principles from typical HE and Lidwell book* 5. Identify major issues for final principles list (final list has 8 principles)* *See documentation below
Step 2: Explore standard HE principles
Best fitting principles from a traditional Heuristic Evaluation (as per Nielsen, 1995): 1. Do we know what’s happening? (Visibility – 250) 2. User Control and Freedom 3. Error Prevention (Error - 82, Forgiveness - 104) 4. Flexibility & Efficiency of use (Control - 64) 5. Consistency & Standards (56) 6. Recognition rather than recall (200) Lidwell Universal Principles of Design Book: Hierarchy of needs (124) Affordance (22) what does street afford? Aesthetics: anthropomorphic form, alignment, iconic representation 80/20 rule (14) - the 80% is really well taken care of Accessibility (16) Confirmation (54) Constraint (60) Cost-Benefit (68) Entry Point (80) Forgiveness (104) Hick’s Law (120) Interference Effects (138) Mimicry (156) Nudge (170) Performance Load (178) Progressive Disclosure (188) Readability (198) Signal to Noise (224) Wayfinding (260)
Step 4: Aggregate most relevant principles from typical HE and Lidwell book
Step 5: Identify major issues to develop list of final 8 principles
Heuristic Evaluation Principles Development Process Research
Aggregate
Refine
Traditional Heuristic Evaluation
Universal Principles of Design (Lidwell et al.)
Principles Relevant to Street Design for Widespread, Inclusive Everyday Cycling
Narrow Down to Final List of 8 Principles