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  {
   "a": "naturalistic_crash_near_crash",
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  {
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   "a": "mind_wandering",
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  {
   "a": "peripheral_attention",
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  {
   "a": "in_vehicle_coaching",
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  {
   "a": "in_vehicle_coaching",
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  {
   "a": "automation_surprise",
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  {
   "a": "driver_education_effectiveness",
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   "lift": 2.35,
   "papers": 40
  },
  {
   "a": "exposure_measurement",
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  {
   "a": "executive_function",
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  {
   "a": "novice_drivers",
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   "lift": 2.3,
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  {
   "a": "mobile_phones",
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   "lift": 2.3,
   "papers": 36
  },
  {
   "a": "external_distraction",
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  {
   "a": "gaze_based_attention_detection",
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  {
   "a": "in_vehicle_coaching",
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  {
   "a": "drowsiness",
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  {
   "a": "attention_allocation",
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  {
   "a": "cognitive_capacity_variation",
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  {
   "a": "dual_task_performance",
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  {
   "a": "cognitive_capacity_variation",
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  },
  {
   "a": "exposure_measurement",
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  {
   "a": "attention_selective_divided",
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  {
   "a": "ehmi_external_hmi",
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  {
   "a": "manual",
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  {
   "a": "hands_on_hands_off_engagement",
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  {
   "a": "simulator_training_transfer",
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   "papers": 25
  },
  {
   "a": "mental_model_of_traffic",
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  {
   "a": "distraction_detection_algorithms",
   "b": "situational_awareness",
   "jaccard": 0.049,
   "lift": 2.12,
   "papers": 260
  },
  {
   "a": "simulator_validity_fidelity",
   "b": "useful_field_of_view",
   "jaccard": 0.019,
   "lift": 2.12,
   "papers": 41
  },
  {
   "a": "hazard_perception_training",
   "b": "situational_awareness",
   "jaccard": 0.01,
   "lift": 2.1,
   "papers": 36
  },
  {
   "a": "traffic_density",
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   "lift": 2.1,
   "papers": 34
  },
  {
   "a": "mci_dementia_driving",
   "b": "sex_gender",
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   "lift": 2.1,
   "papers": 30
  },
  {
   "a": "cognitive",
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  },
  {
   "a": "behavioral_adaptation_risk_compensation",
   "b": "situational_awareness",
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   "papers": 32
  },
  {
   "a": "exposure_measurement",
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  {
   "a": "automation_complacency_bias",
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  {
   "a": "hud_ar_windshield",
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   "papers": 27
  },
  {
   "a": "alcohol",
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   "lift": 2.03,
   "papers": 38
  },
  {
   "a": "drowsiness_detection_algorithms",
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   "jaccard": 0.048,
   "lift": 2.02,
   "papers": 266
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  {
   "a": "illicit_drugs",
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   "lift": 2.02,
   "papers": 28
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  {
   "a": "situational_awareness",
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   "papers": 134
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  {
   "a": "simulator_validity_fidelity",
   "b": "speed_choice",
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   "lift": 2.01,
   "papers": 29
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  }
 ],
 "thresholds": {
  "min_lift": 2.0,
  "min_papers": 25,
  "note": "a pair must clear BOTH; lift = observed / chance-expected co-occurrence"
 }
}