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Semantic congruency of auditory warnings.

Sarah J Isherwood1, Denis McKeown2

  • 1a School of Medicine, University of Leeds , Leeds , UK.

Ergonomics
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Summary

Semantically congruent auditory icons, which match their meaning, improve operator performance more than incongruent icons or abstract alarm sounds. This effect persists even with experience, highlighting the importance of sound representativeness in warning systems.

Keywords:
Auditory warningsauditory displaysauditory iconshuman–computer interactionuser experience

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Area of Science:

  • Human-Computer Interaction
  • Auditory Display Design
  • Cognitive Psychology

Background:

  • Auditory alarms are critical for alerting operators in various systems.
  • The effectiveness of auditory warnings depends on their design and semantic congruence.
  • Operator performance can be influenced by the type of auditory signals used.

Purpose of the Study:

  • To investigate operator performance and experience with semantically congruent and incongruent auditory icons and abstract alarm sounds.
  • To determine how sound type and semantic congruency affect performance over time.
  • To compare the impact of auditory icons versus abstract sounds on operator response.

Main Methods:

  • Twenty-four participants were divided into auditory icon or abstract alarm groups.
  • Both congruent and incongruent alarms were presented for different driving task scenarios.
  • Participants responded by selecting the corresponding driving scenario for each alarm.

Main Results:

  • Operator performance improved over time for all sound types.
  • Incongruent iconic sounds led to slower responses compared to congruent ones.
  • Abstract warning sounds resulted in lower accuracy than congruent auditory icons.
  • Semantic congruency was more critical for auditory icons than abstract sounds.

Conclusions:

  • Semantically congruent auditory icons offer performance advantages over incongruent icons and abstract warnings.
  • Operator experience mitigates but does not eliminate performance decrements associated with non-congruent or abstract sounds.
  • The representativeness of auditory warnings significantly impacts operator performance in time-sensitive tasks.