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

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.

Measures of Intelligence

Measures of Intelligence

Psychologists measure intelligence by using standardized tests that produce a score known as the intelligence quotient or IQ. To understand IQ tests, it's important to recognize the key principles behind their construction: validity, reliability, and standardization.
Validity refers to how well a test measures what it claims to measure. An intelligence test should accurately assess intelligence rather than another characteristic, like anxiety. Criterion validity is one way to evaluate this;...

Self-Report Tests of Personality

Self-Report Tests of Personality

Self-report inventories are objective personality assessments that use multiple-choice items or numbered scales, typically ranging from 1 (strongly disagree) to 5 (strongly agree). They are often called Likert scales after Rensis Likert. These inventories are widely used due to their ease of administration and cost-effectiveness. One of the most prominent examples is the Minnesota Multiphasic Personality Inventory (MMPI), initially developed in the 1940s to assess abnormal personality traits.

SBAR II: Application of SBAR

SBAR II: Application of SBAR

SBAR is an effective communication tool used by healthcare professionals to communicate patient information accurately. SBAR stands for Situation, Background, Assessment, and Recommendation. For a better understanding, an example is given below.
SBAR Report from a Nurse to a Health Care Provider
S: "Hello, Dr. Smith. This is Jane, RN, from the Med Surg unit. I am calling to tell you about Ms. White in Room 210, who is experiencing increased pain and redness at her incision site. Her recent...

You might also read

Related Articles

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

Sort by

Same author

Perceived, but Not Neuromuscular, Fatigue Demonstrated After Doubles Pickleball Competitions.

Research quarterly for exercise and sport·2026

Same author

Long-Term and Short-Term Forecasting of Oriental Fruit Moth (<i>Grapholita molesta</i>) Trap Catches from Apple Orchards in South Korea Using Time Series Models.

Plants (Basel, Switzerland)·2026

Same author

Trends in American Female Youth and Junior Weightlifting Performance From 2015 to 2023.

Journal of strength and conditioning research·2025

Same author

Lack of Neuromuscular Fatigue in Singles Pickleball Tournament: A Preliminary Study.

Journal of functional morphology and kinesiology·2025

Same author

Reduction of High Emotional Eating via Increased Physical Activity: Assessing a Path Informed by Multiple Behavioral Theories Within Community-Based Obesity Interventions.

Journal of prevention (2022)·2025

Same author

An agricultural digital twin for mandarins demonstrates the potential for individualized agriculture.

Nature communications·2024

Search research articles

Related Experiment Video

Updated: Jan 4, 2026

Development of a Virtual Reality Assessment of Everyday Living Skills

Development of a Virtual Reality Assessment of Everyday Living Skills

Published on: April 23, 2014

Reliability and Criterion Validity of the Assess2Perform Bar Sensei.

George K Beckham¹, Danielle K Layne¹, Steven B Kim²

¹Kinesiology Department, California State University, Monterey Bay, Seaside, CA 93955, USA.

Sports (Basel, Switzerland)

|November 10, 2019

Summary

The Assess2Perform Bar Sensei device shows poor validity and reliability for measuring barbell velocity during back squats. It is not recommended for velocity-based training due to inconsistent measurements compared to validated tools.

Keywords:

accelerometer autoregulation inertial measurement unit resistance training velocity-based training

More Related Videos

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

The Multiple Sclerosis Performance Test MSPT: An iPad-Based Disability Assessment Tool

The Multiple Sclerosis Performance Test MSPT: An iPad-Based Disability Assessment Tool

Published on: June 30, 2014

Related Experiment Videos

Last Updated: Jan 4, 2026

Development of a Virtual Reality Assessment of Everyday Living Skills

Development of a Virtual Reality Assessment of Everyday Living Skills

Published on: April 23, 2014

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

The Multiple Sclerosis Performance Test MSPT: An iPad-Based Disability Assessment Tool

The Multiple Sclerosis Performance Test MSPT: An iPad-Based Disability Assessment Tool

Published on: June 30, 2014

Area of Science:

Sports Science
Biomechanics
Strength and Conditioning

Background:

Velocity-based training (VBT) relies on accurate barbell velocity measurement.
The Assess2Perform Bar Sensei is a new device for VBT that requires validation.
Existing validated tools like the GymAware PowerTool serve as a benchmark for accuracy.

Purpose of the Study:

To determine the criterion validity and reliability of the Assess2Perform Bar Sensei.
To compare Bar Sensei measurements against the validated GymAware PowerTool.
To assess the Bar Sensei's performance in measuring barbell velocity during back squats.

Main Methods:

Sixteen resistance-trained individuals performed back squats at 45%, 60%, and 75% of their one-repetition maximum (1RM).
Barbell velocity (mean concentric velocity and peak concentric velocity) was measured concurrently using the Bar Sensei and GymAware PowerTool.
Intraclass correlation coefficients (ICCs) were calculated to assess agreement and reliability.

Main Results:

The Bar Sensei demonstrated fair to poor agreement with the PowerTool at 45% 1RM (ICC 0.4-0.59).
Agreement further deteriorated to poor levels at 60% and 75% 1RM (ICC 0.3-0.4).
Inter-repetition reliability for the Bar Sensei (ICC 0.273-0.451) was substantially lower than for the PowerTool (ICC 0.651-0.793).

Conclusions:

The Assess2Perform Bar Sensei lacks criterion validity when compared to a validated instrument.
The device exhibits poor reliability for measuring barbell velocity in back squats.
Currently, the Bar Sensei is not a recommended tool for accurate VBT applications.