Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Testing a Claim about Standard Deviation

Testing a Claim about Standard Deviation

A complete procedure to test a claim about population standard deviation or population variance is explained here.
The hypothesis testing for the claim of population standard deviation (or variance) requires the data and samples to be random and unbiased. The population distribution also must be normal. There is no specific requirement on the sample size as the estimation is based on the chi-square distribution.
As a first step, the hypothesis (null and alternative) concerning the claim about...

Comparing Experimental Results: Student's t-Test

Comparing Experimental Results: Student's t-Test

The t-test is a statistical method used to compare the sample mean with a population mean or compare two means from two data sets. The test statistic is calculated from the standard deviation, mean, and number of measurements in the data set at a selected confidence interval and then compared to a table of critical values at this confidence level. If the test statistic is smaller than the critical value, the null hypothesis is accepted. In this case, we state that the difference between the...

Uncertainty in Measurement: Accuracy and Precision

Uncertainty in Measurement: Accuracy and Precision

Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value.

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.

Uncertainty in Measurement: Reading Instruments

Uncertainty in Measurement: Reading Instruments

Counting is the type of measurement that is free from uncertainty, provided the number of objects being counted does not change during the process. Such measurements result in exact numbers. By counting the eggs in a carton, for instance, one can determine exactly how many eggs are there in the carton. Similarly, the numbers of defined quantities are also exact. For example, 1 foot is exactly 12 inches, 1 inch is exactly 2.54 centimeters, and 1 gram is exactly 0.001 kilograms. Quantities...

You might also read

Related Articles

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

Sort by

Same author

Reliability and Measurement Error of the Qualitative Analysis of Single Leg Loading (QASLS) Tool For Unilateral Tasks.

International journal of sports physical therapy·2023

Same author

The Test-Retest Reliability of Bilateral and Unilateral Force Plate-Derived Parameters of the Countermovement Push-Up in Elite Boxers.

Journal of sport rehabilitation·2021

Same author

The Test-Retest Reliability of Force Plate-Derived Parameters of the Countermovement Push-Up as a Power Assessment Tool.

Journal of sport rehabilitation·2019

Same author

The effectiveness of an exercise programme on dynamic balance in patients with medial knee osteoarthritis: A pilot study.

The Knee·2016

Same author

Technique determinants of knee abduction moments during pivoting in female soccer players.

Clinical biomechanics (Bristol, Avon)·2015

Same author

Sorting swimmers shoulders: An observational study on swimmers that presented to a shoulder surgeon.

International journal of shoulder surgery·2015

Search research articles

Related Experiment Video

Updated: Jun 7, 2026

Doppler Ultrasound-Based Leg Blood Flow Assessment During Single-Leg Knee-Extensor Exercise in an Uncontrolled Setting

Doppler Ultrasound-Based Leg Blood Flow Assessment During Single-Leg Knee-Extensor Exercise in an Uncontrolled Setting

Published on: December 15, 2023

Between-session reliability of the star excursion balance test.

Allan G Munro¹, Lee C Herrington

¹School of Health, Sport and Rehabilitation Sciences, University of Salford, Salford M6 6PU, United Kingdom. A.G.Munro@pgr.salford.ac.uk

Physical Therapy in Sport : Official Journal of the Association of Chartered Physiotherapists in Sports Medicine

|November 9, 2010

Summary

This summary is machine-generated.

The Star Excursion Balance Test (SEBT) demonstrates high test-retest reliability for healthy athletes. Clinicians need at least a 6-8% change in SEBT scores to confirm a real improvement in lower limb function.

More Related Videos

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability

Published on: September 18, 2020

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity

Published on: June 12, 2019

Related Experiment Videos

Last Updated: Jun 7, 2026

Doppler Ultrasound-Based Leg Blood Flow Assessment During Single-Leg Knee-Extensor Exercise in an Uncontrolled Setting

Doppler Ultrasound-Based Leg Blood Flow Assessment During Single-Leg Knee-Extensor Exercise in an Uncontrolled Setting

Published on: December 15, 2023

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability

Published on: September 18, 2020

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity

Published on: June 12, 2019

Area of Science:

Biomechanics
Sports Medicine
Rehabilitation Science

Background:

The Star Excursion Balance Test (SEBT) is frequently used to assess dynamic balance and lower limb function.
Understanding the learning effect, reliability, and measurement error of the SEBT is crucial for its accurate clinical application.

Purpose of the Study:

To evaluate the learning effect associated with the SEBT.
To determine the test-retest reliability of the SEBT.
To quantify the measurement error of the SEBT in healthy recreational athletes.

Main Methods:

A repeated-measures study design was employed in a controlled university laboratory setting.
Twenty-two healthy recreational athletes (11 male, 11 female) participated.
Repeated-measures ANOVA and intraclass correlation coefficients were used to analyze learning effects, reliability, and measurement error.

Main Results:

Excursion distances stabilized after four trials, with trials 5-7 used for reliability analysis.
High test-retest reliability was observed for all reach directions (ICC range: 0.84–0.92).
Standard error of measurement and smallest detectable difference values ranged from 2.21-2.94% and 6.13-8.15%, respectively.

Conclusions:

The SEBT is a reliable measure for assessing lower limb function in healthy recreational athletes.
Clinicians can differentiate true performance changes from random error using the calculated statistics.
A change of at least 6-8% in normalized SEBT scores is recommended to indicate a genuine change in performance.