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Echo01:06

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The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
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How distance mitigates perceived threat at 30-90 m.

Arthur E Stamps1

  • 1Institute of Environmental Quality, San Francisco, CA 94110, USA. InstituteOfEnvironmentalQuality@comcast.net

Perceptual and Motor Skills
|August 24, 2012
PubMed
Summary

Non-verbal cues like sex and posture communicate threat at greater distances than previously thought. These cues remain effective up to 90 meters, challenging earlier research limitations.

Area of Science:

  • Psychology
  • Social Psychology
  • Human Behavior

Background:

  • Distance significantly impacts the perception of non-verbal threat cues.
  • Previous studies were limited to distances of 45 meters or less.
  • Theoretical models suggest threat perception may extend to 100 meters.

Purpose of the Study:

  • To investigate the range at which sex and posture communicate threat.
  • To extend the investigation of non-verbal threat cue perception beyond 45 meters.

Main Methods:

  • Participants assessed threat perception based on sex and posture cues.
  • Experiments were conducted at distances up to 90 meters.

Main Results:

  • Sex and posture were found to communicate threat at distances up to 90 meters.

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  • The effective range for these non-verbal threat cues was determined to be between 30 and 90 meters.
  • Conclusions:

    • Non-verbal cues of sex and posture can communicate threat at considerably greater distances than previously established.
    • The perception of threat from these cues diminishes significantly beyond 90 meters.