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

Frictional Forces on Screws

Frictional Forces on Screws

Screws are characterized by a helical ridge known as a thread wrapped around a cylindrical shaft. They are commonly used as fasteners to hold objects together or to transmit power and motion in machines. One type of screw that is particularly useful for transmitting power is the square-threaded screw.
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...

Machines: Problem Solving I

Machines: Problem Solving I

A toggle clamp is a mechanical device commonly used for holding and clamping objects in various applications, such as woodworking, metalworking, and assembly operations. Consider a toggle clamp subjected to a force of 200 N at the handle. The vertical clamping force can be calculated, provided the dimensions of the toggle clamp are known.
The toggle clamp system is a machine structure consisting of movable, pin-connected multi-force members that form a stabilized system to transmit forces. The...

Machines: Problem Solving II

Machines: Problem Solving II

Machines are complex structures consisting of movable, pin-connected multi-force members that work together to transmit forces. Consider a lifting tong carrying a 100 kg load. It comprises movable sections DAF and CBG linked together with member AB.

Static and Kinetic Frictional Force

Static and Kinetic Frictional Force

One of the simpler characteristics of sliding friction is that it is parallel to the contact surfaces between systems, and is always in a direction that opposes the motion or attempted motion of the systems relative to each other. If two systems are in contact and moving relative to one another, then the friction between them is called kinetic friction. For example, kinetic friction slows a hockey puck sliding on ice.
However, if two systems are in contact and are stationary relative to one...

Upward Impending Motion

Upward Impending Motion

A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. Its operation is based on converting the force applied at its handle into a torsional moment, causing the upward impending motion of the screw. This movement is accomplished by overcoming the static friction between the threads of the screw and the jack.
To better comprehend how a screw jack functions, consider the completely unraveled thread as a block in contact with the...

Three-Dimensional Force System:Problem Solving

Three-Dimensional Force System:Problem Solving

A three-dimensional force system refers to a scenario in which three forces act simultaneously in three different directions. This type of problem is commonly encountered in physics and engineering, where it is necessary to calculate the resultant force on the system, which can then be used to predict or analyze the behavior of the object or structure under consideration.
To solve a three-dimensional force system, first resolve each force into its respective scalar components. Do this using...

You might also read

Related Articles

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

Sort by

Same author

Preliminary examination of symptom validity in veterans using the Rivermead post-concussion symptoms questionnaire.

Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists·2026

Same author

Within-Person Score Distribution Measures as Performance Validity Indicators in Service Members and Veterans with and without History of Mild Traumatic Brain Injury.

Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists·2025

Same author

Derivation of embedded symptom validity indicators for the Brief Symptom Inventory-18.

The Clinical neuropsychologist·2025

Same author

Objective Versus Subjective Cognitive Status Following Mild Traumatic Brain Injury: The Role of Psychological Factors.

The Journal of head trauma rehabilitation·2025

Same author

Reconsidering cognitive outcome one year after mild traumatic brain injury: Secondary analysis of TRACK-TBI data.

The Clinical neuropsychologist·2025

Same author

Collinearity, tetrachoric correlation, and criterion group assignment of examinees failing only one performance validity test (PVT): Testing Leonhard's (2023) PVT critique.

The Clinical neuropsychologist·2025

Search research articles

Related Experiment Video

Updated: Jun 16, 2026

Measurement of Spatial Stability in Precision Grip

Measurement of Spatial Stability in Precision Grip

Published on: June 4, 2020

Using grip strength force curves to detect simulation: a preliminary investigation.

Jeremy J Davis¹, Jacqueline R Wall, Crystal K Ramos

¹School of Psychological Sciences, University of Indianapolis, Indianapolis, IN 46227, USA.

Archives of Clinical Neuropsychology : the Official Journal of the National Academy of Neuropsychologists

|February 9, 2010

Summary

Grip strength force curve analysis can detect suboptimal effort. The average to peak force ratio showed differences between groups, suggesting its potential as an effort measure in research.

More Related Videos

In vivo Measurement of Knee Extensor Muscle Function in Mice

In vivo Measurement of Knee Extensor Muscle Function in Mice

Published on: March 4, 2021

Related Experiment Videos

Last Updated: Jun 16, 2026

Measurement of Spatial Stability in Precision Grip

Measurement of Spatial Stability in Precision Grip

Published on: June 4, 2020

In vivo Measurement of Knee Extensor Muscle Function in Mice

In vivo Measurement of Knee Extensor Muscle Function in Mice

Published on: March 4, 2021

Area of Science:

Neuroscience
Rehabilitation Medicine
Psychology

Background:

Grip strength force curve analysis is a validated method for detecting suboptimal effort in industrial rehabilitation.
Standardized neuropsychological procedures are crucial for administering grip strength tests accurately.

Purpose of the Study:

To investigate the efficacy of grip strength force curve analysis as a measure of effort in a healthy undergraduate population.
To compare the effort detection capabilities of force curve analysis with established measures like the Word Memory Test (WMT).

Main Methods:

Eighty-two undergraduates were randomly assigned to control, naïve simulator, or coached simulator conditions.
Grip strength, force curve variables, and Word Memory Test (WMT) performance were measured.
Statistical analysis focused on differences in average force and the average to peak force ratio between groups.

Main Results:

No significant differences were observed in average grip strength (kg) between the groups.
Significant differences were found in the average to peak force ratio derived from grip strength force curves.
The classification accuracy of the average to peak force ratio was lower than the WMT but comparable to other effort measures.

Conclusions:

Grip strength force curve analysis, specifically the average to peak force ratio, shows potential as an objective measure of effort.
Further research is warranted to explore its utility in clinical populations.
Force curve analysis may offer a valuable tool for assessing effort in various research and clinical settings.