What the grouping severed
Topic categories form a graph, not a tree: the strongest relationships in this corpus cut across any grouping. These pairs clear the relatedness bar (at least 25 shared papers and 2.0× the co-occurrence chance predicts) yet sit in different areas, so browsing the hierarchy alone will not reveal them. They are listed here rather than quietly dropped.
- Forensic Human Factors ↔ Two-Wheeler & Motorcycle Drivers 50 shared papers · 7.08× expected · Crash Causation & Forensic Human Factors vs Populations & Road Users
- Two-Wheeler & Motorcycle Drivers ↔ Visibility & Lighting 77 shared papers · 4.41× expected · Populations & Road Users vs Road Environment, Weather & Visibility
- Crash Causation & Contributing Factors ↔ Two-Wheeler & Motorcycle Drivers 85 shared papers · 4.34× expected · Crash Causation & Forensic Human Factors vs Populations & Road Users
- Driver Psychology, Style & Traits ↔ General Human Factors (Cross-Domain) 137 shared papers · 3.35× expected · Driver Psychology & Individual Differences vs In-Vehicle Tech & HMI
- Crash Causation & Contributing Factors ↔ General Human Factors (Cross-Domain) 109 shared papers · 3.33× expected · Crash Causation & Forensic Human Factors vs In-Vehicle Tech & HMI
- Forensic Human Factors ↔ Visual Perception & Hazard Perception in Driving 181 shared papers · 3.29× expected · Crash Causation & Forensic Human Factors vs Perception & Hazard Perception
- Individual Differences (Driver Population) ↔ General Human Factors (Cross-Domain) 171 shared papers · 3.11× expected · Driver Psychology & Individual Differences vs In-Vehicle Tech & HMI
- Age & Experience ↔ Simulator Methodology & Validity 214 shared papers · 3.0× expected · Populations & Road Users vs How Driving Gets Studied
- Driver Impairment ↔ Policy & Enforcement 249 shared papers · 2.7× expected · Impairment vs Policy, Law & Enforcement
- Occupant Protection Behavior ↔ Policy & Enforcement 92 shared papers · 2.7× expected · Occupant Protection vs Policy, Law & Enforcement
- Driver Psychology, Style & Traits ↔ Training, Education & Intervention 266 shared papers · 2.65× expected · Driver Psychology & Individual Differences vs Training, Education & Countermeasures
- Age & Experience ↔ Policy & Enforcement 276 shared papers · 2.55× expected · Populations & Road Users vs Policy, Law & Enforcement
- Crash Causation & Contributing Factors ↔ Individual Differences (Driver Population) 261 shared papers · 2.35× expected · Crash Causation & Forensic Human Factors vs Driver Psychology & Individual Differences
- Crash Statistics & Epidemiology ↔ Individual Differences (Driver Population) 756 shared papers · 2.28× expected · Crash Statistics & Epidemiology vs Driver Psychology & Individual Differences
- Age & Experience ↔ Visual Perception & Hazard Perception in Driving 430 shared papers · 2.16× expected · Populations & Road Users vs Perception & Hazard Perception
- Individual Differences (Driver Population) ↔ Training, Education & Intervention 287 shared papers · 2.13× expected · Driver Psychology & Individual Differences vs Training, Education & Countermeasures
- Individual Differences (Driver Population) ↔ Driver Impairment 261 shared papers · 2.12× expected · Driver Psychology & Individual Differences vs Impairment
- Cognitive Workload ↔ General Human Factors (Cross-Domain) 316 shared papers · 2.02× expected · Attention, Distraction & Workload vs In-Vehicle Tech & HMI
The full pair table, with thresholds, is published at /machine/affinity.json.