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Reliability and Validity01:29

Reliability and Validity

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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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Related Experiment Video

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Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity
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The Isometric Horizontal Push Test: Test-Retest Reliability and Validation Study.

Antonio Dello Iacono, Stephanie Valentin, Mark Sanderson

    International Journal of Sports Physiology and Performance
    |October 13, 2019
    PubMed
    Summary
    This summary is machine-generated.

    The isometric horizontal push test (IHPT) demonstrates excellent reliability and validity for measuring maximal isometric force. This affordable and portable test is suitable for assessing and monitoring strength in athletes.

    Keywords:
    assessmentforcemonitoringsport sciencestrength and conditioning

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    Area of Science:

    • Sports Science
    • Biomechanics
    • Exercise Physiology

    Background:

    • Assessing maximal isometric force is crucial for athletic performance evaluation.
    • Existing methods may lack specificity or practicality for measuring horizontal force components.

    Purpose of the Study:

    • To evaluate the test-retest reliability and criterion validity of the novel isometric horizontal push test (IHPT).
    • To determine the IHPT's suitability for measuring the horizontal component of maximal isometric force.

    Main Methods:

    • Twenty-four resistance-trained males completed two IHPT sessions within 3-4 days.
    • Peak force was measured using a strain gauge and a force plate concurrently.
    • Three maximal IHPT trials were performed per session with 3-minute rest intervals.

    Main Results:

    • The IHPT exhibited nearly perfect test-retest reliability (ICC ≈ .99).
    • Bland-Altman analysis indicated excellent agreement between testing days with minimal bias.
    • High correlation (r = .98) and good sensitivity were observed between the strain gauge and force plate measurements.

    Conclusions:

    • The IHPT demonstrates high validity, reliability, and sensitivity for assessing maximal horizontal isometric force.
    • Its affordability, portability, ease of use, and time efficiency make it valuable for strength assessment and monitoring.