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Reliability and Validity

Reliability and Validity

Reliability and validity are two important considerations that must be made with any type of data collection. Reliability refers to the ability to consistently produce a given result. In the context of psychological research, this would mean that any instruments or tools used to collect data do so in consistent, reproducible ways.

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The Reliability and Validity of the Modified Butterfly Agility Test.

Richard Cahanin¹, Troy Burley¹, Andy Waldhelm²

¹Physical Therapy University of South Alabama.

International Journal of Sports Physical Therapy

|May 5, 2025

Summary

The modified Butterfly Agility Test (mBAT) is reliable for assessing athletic performance. Three practice trials are recommended before official testing for optimal results in soccer athletes.

Keywords:

Sport agility performance screening test

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Area of Science:

Sports Medicine
Biomechanics
Athletic Performance Assessment

Background:

No definitive criteria exist for return-to-sport decisions.
The Butterfly Agility Test (BAT) is valid and reliable but requires significant space and hasn't been validated in athletes.
A modified version (mBAT) was developed to address these limitations.

Purpose of the Study:

To determine the reliability of the modified Butterfly Agility Test (mBAT) and optimal practice trials.
To assess the preliminary validity of the mBAT against the Y-Balance Test (YBT).
To examine the relationship between mBAT performance and player position in soccer athletes.

Main Methods:

A multi-phase reliability and validity study was conducted.
Phase I: Assessed mBAT test-retest and inter-rater reliability in 25 healthy adults.
Phase II: Assessed mBAT and YBT performance in 45 competitive soccer athletes, analyzing relationships with player position.

Main Results:

The mBAT demonstrated excellent reliability (ICC = 0.92-1.00).
Female collegiate athletes outperformed male high-school athletes on the mBAT.
No significant correlations were found between mBAT/YBT performance and player position.

Conclusions:

The mBAT is a reliable tool for assessing physical performance in soccer athletes.
Three practice trials are recommended for optimal mBAT reliability.
While preliminary, the mBAT shows potential for clinicians and coaches, but further validation is needed for clinical decision-making.