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Social Facilitation01:04

Social Facilitation

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Not all intergroup interactions lead to negative outcomes. Sometimes, being in a group situation can improve performance. Social facilitation occurs when an individual performs better when an audience is watching than when the individual performs the behavior alone. This typically occurs when people are performing a task for which they are skilled.
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Related Experiment Video

Updated: Jun 15, 2025

Importance of Jumping Ability in Handball Throwing Speed and Accuracy
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Change-of-Direction Performance and Its Deficits in Relation to Countermovement-Jump Height and Phase-Specific

Naoyuki Yamashita1, Daisuke Sato2, Takaaki Mishima3

  • 1Faculty of Arts and Sciences, Kyoto Institute of Technology, Kyoto, Japan.

International Journal of Sports Physiology and Performance
|August 27, 2024
PubMed
Summary

Improving countermovement-jump (CMJ) height and force production can enhance change-of-direction (COD) performance. Athletes should focus on CMJ technique and explosive power to improve agility and reduce COD deficits.

Keywords:
concentric-phase rate of force developmentteam sportsunloading phasevertical ground-reaction force

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Area of Science:

  • Sports Science
  • Biomechanics
  • Athletic Performance

Background:

  • Pro-agility performance is linked to linear sprint and jump abilities.
  • Correlation does not confirm causation, necessitating investigation into underlying factors.

Purpose of the Study:

  • To determine the relationship between change-of-direction (COD) performance and COD deficits (COD-D).
  • To identify predictors of COD and COD-D using linear sprint and countermovement-jump (CMJ) metrics.
  • To utilize multiple stepwise linear-regression models for analysis.

Main Methods:

  • 42 female intercollegiate athletes participated.
  • Measured 10- and 20-m linear sprint times, pro-agility times, COD-D, CMJ height, and CMJ phase-specific force production.
  • Applied stepwise linear-regression analyses to identify predictive factors for COD and COD-D.

Main Results:

  • CMJ height predicted 10-m pro-agility performance (R² = .234).
  • Modified Reactive Strength Index and lower CMJ center-of-mass depth predicted 20-m pro-agility performance (R² = .330).
  • Rate of force development during the CMJ concentric phase predicted COD-D for both 10-m and 20-m distances (R² = .183 and .237).

Conclusions:

  • Improving CMJ height is crucial for enhancing pro-agility performance.
  • Athletes can improve COD by increasing CMJ depth and instantaneous force production post-eccentric braking.
  • Targeting specific CMJ phases and force characteristics can optimize COD and reduce COD-D.