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INTER-RATER AGREEMENT AND VALIDITY OF A TACKLING PERFORMANCE ASSESSMENT SCALE IN YOUTH AMERICAN FOOTBALL.

Eric Schussler1, Richard J Jagacinski2, Susan E White2

  • 1Old Dominion University, Norfolk, VA, USA.

International Journal of Sports Physical Therapy
|August 10, 2018
PubMed
Summary

Expert raters demonstrated better agreement in assessing youth tackling technique using the Qualitative Youth Tackling System (QYTS). This system shows potential for improving player safety by refining tackling form.

Keywords:
ConcussionFeedbackFootballMotor Learning

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Area of Science:

  • Sports Medicine
  • Biomechanics
  • Injury Prevention

Background:

  • American football participation carries risks of long-term neurologic injury and concussion.
  • Modifying tackling techniques is crucial for reducing head acceleration-related neurologic injuries.
  • The Qualitative Youth Tackling System (QYTS) is a feedback tool designed to correct tackling form.

Purpose of the Study:

  • To evaluate the inter-rater agreement of the QYTS among novice and expert raters.
  • To determine the validity of the QYTS by comparing its assessments with objective motion capture data.
  • To compare the performance of novice versus expert raters in utilizing the QYTS.

Main Methods:

  • Novice and experienced raters assessed video footage of youth athletes (ages 9-13) tackling a dummy.
  • A binary rating scale was used to identify successful performance of each tackling component.
  • Inter-rater agreement and agreement with motion capture validation measures were analyzed.

Main Results:

  • Inter-rater agreement varied across components, with moderate agreement for head placement (k=.48) and fair for others, but no agreement for pelvic height (k=.-16).
  • Agreement with motion capture data showed substantial agreement for pelvic height (k=.63) and fair to slight agreement for other components.
  • Experienced raters consistently outperformed novice raters across all assessed tackling components.

Conclusions:

  • Skilled raters exhibit superior ability in identifying QYTS movement patterns compared to novice raters.
  • The QYTS demonstrates potential for improving the assessment of tackling technique, particularly when used by experienced individuals.
  • Findings suggest the QYTS, when used by experts, can contribute to more reliable evaluation of tackling form, potentially enhancing player safety.