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Perception of relative throw-ability.

Qin Zhu1, Todd Mirich, Geoffrey P Bingham

  • 1Division of Kinesiology and Health, University of Wyoming, Dept. 3196, 1000 E. University Avenue, Laramie, WY, 82071, USA, qzhu1@uwyo.edu.

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Skilled throwers can perceive relative throw-ability, judging object order for maximum distance. Discrimination was better for weight within a size than between sizes, suggesting nuanced perceptual information use.

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Area of Science:

  • Human motor control
  • Perception and action
  • Biomechanics

Background:

  • Previous research established that skilled throwers can identify optimal objects for maximal throwing distance.
  • Felt heaviness has been identified as a key perceptual cue for optimal throw-ability.
  • The concept of relative throw-ability, an ordinal judgment of throwing performance across objects, was previously hypothesized.

Purpose of the Study:

  • To investigate whether skilled throwers can perceive the relative throw-ability of objects.
  • To test the hypothesis that throwers can judge the ordinal scaling of throwing distances for different objects.
  • To compare perceptual judgments of relative throw-ability with actual throwing performance data.

Main Methods:

  • A magnitude estimation task was employed to assess participants' ability to perceive relative throw-ability.
  • Participants' judgments were compared against previously recorded data on throwing distances for various objects.
  • Objects varied in size and weight, allowing for analysis of discrimination abilities across these dimensions.

Main Results:

  • Participants successfully performed the perceptual task, demonstrating an ability to judge relative throw-ability.
  • Discrimination of throwing performance was more accurate for objects differing in weight within the same size category.
  • Discrimination was less precise for objects differing in size, even with similar weights.

Conclusions:

  • Skilled throwers can perceive relative throw-ability, supporting the hypothesis of ordinal judgment in throwing.
  • Perceptual sensitivity to weight differences within a size is greater than to size differences.
  • These findings provide insights into the specific perceptual information used by throwers to evaluate objects for maximal distance.