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Driver Compensation: Impairment or Improvement?

Richard A Young1

  • 1Wayne State University, Detroit, Michigan richardyoung9@gmail.com.

Human Factors
|November 5, 2015
PubMed
Summary
This summary is machine-generated.

The cognitive distraction scale for auditory-vocal tasks does not show significant driving impairments. Slower reaction times were compensated by increased following distances, and cell phone use may decrease crash risk.

Keywords:
accidentsaggressive and risky drivingattentional processescognitioncomputer systemsdisplays and controlsdistractiondistractions and interruptionsdual taskhuman errorhuman-computer interactioninterface evaluationmental workloadrisk assessmentspeech user interfaces (sui)surface transportationtask switchingtime sharingusability/acceptance measurement and research

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Area of Science:

  • Human Factors
  • Transportation Safety
  • Cognitive Psychology

Background:

  • The impact of cognitive distraction on driving safety is a critical concern.
  • Auditory-vocal tasks, such as cell phone conversations, are often hypothesized to impair driving performance.
  • Existing scales aim to quantify this distraction to assess driving impairment.

Purpose of the Study:

  • To critically evaluate the validity of a "cognitive distraction scale" designed for auditory-vocal tasks.
  • To determine if the scale accurately indicates significant driving impairments.
  • To re-examine the relationship between auditory-vocal tasks, reaction times, and driving behavior.

Main Methods:

  • Re-analysis of existing data on brake reaction times during auditory-vocal tasks.
  • Analysis of naturalistic driving data to assess crash risk associated with cellular conversations.
  • Evaluation of the internal and external validity of the cognitive distraction scale.

Main Results:

  • Slower brake reaction times observed during auditory-vocal tasks were fully compensated by drivers maintaining longer following distances.
  • Naturalistic driving data indicated that cellular conversations were associated with a decreased crash risk, contradicting the assumed impairment.
  • The cognitive distraction scale's ability to indicate driving impairment was found to be questionable based on the re-analysis.

Conclusions:

  • The "cognitive distraction scale" for auditory-vocal tasks lacks sufficient data to support claims of significant driving impairments.
  • Driving behavior, including following distance, can adapt to compensate for potential cognitive load.
  • Current data suggest that cellular conversations may not increase, and could potentially decrease, crash risk, challenging the scale's assumptions.