Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Scaling affordances for human reach actions.

Hyeg Joo Choi1, Leonard S Mark

  • 1Department of Psychology, Miami University, Oxford, OH 45056, USA.

Human Movement Science
|January 25, 2005
PubMed
Summary

Human reach actions are predicted by object weight and distance, scaled by individual strength. A new body-scaled equation accurately predicts 90% of reach modes, revealing complex geometric and dynamic constraints.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Static, Dynamic, and Cognitive Fit of Exosystems for the Human Operator.

Human factors·2020
Same author

The impact of object weight, reach distance, discomfort and muscle activation on the location of preferred critical boundary during a seated reaching task.

Human movement science·2015
Same author

Information for step length adjustment in running.

Human movement science·2005
Same author

Effect of a back belt on reaching postures.

Journal of manipulative and physiological therapeutics·2004

Area of Science:

  • Biomechanics
  • Human motor control
  • Perception-action coupling

Background:

  • Understanding human reach actions is crucial in motor control and biomechanics.
  • Previous research by Cesari and Newell explored grip configurations and body-scaling.
  • The interplay of object properties and individual capabilities in reach actions requires further delineation.

Purpose of the Study:

  • To investigate the roles of object weight (W), distance (D), and actor's strength (S) in determining reach actions.
  • To validate and refine Cesari and Newell's methodology for predicting reach modes.
  • To develop a body-scaled equation that integrates geometric and dynamic constraints for reach actions.

Main Methods:

  • Utilized Cesari and Newell's methodology to analyze reach actions.
  • Participants reached for objects of varying weights at different distances.
  • Employed discriminant analysis to identify predictive factors for reach modes.
  • Constructed a body-scaled equation: K=lnD+ln(W/S)/36.

Main Results:

  • Object weight scaled by individual strength and reach distance scaled by maximum-seated reach distance predicted 90% of reach modes.
  • The derived body-scaled equation accurately predicted the reach actions observed.
  • Demonstrated a significant relationship between scaled object properties and reach behavior.

Conclusions:

  • Cesari and Newell's method effectively identifies the complex relationship between geometric and dynamic constraints in reach actions.
  • The developed body-scaled equation provides a robust predictor of human reach behavior.
  • Findings contribute to a deeper understanding of perception-action coupling in motor control.

Related Experiment Videos