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Related Experiment Video

Updated: Feb 26, 2026

Human Egg Maturity Assessment and Its Clinical Application

Human Egg Maturity Assessment and Its Clinical Application

Published on: August 19, 2019

Test-Retest Reliability and Preliminary Reference Data for the Virtual Eggs Test in Healthy Adults.

Lucia Angelini, Michele Piazzini, Marco Baccini

IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society

|February 24, 2026

Summary

The updated Virtual Eggs Test (VET) reliably assesses hand dexterity and grip force. This updated protocol and its outcome measures, the Fine Dexterity Index (FDI) and Gross Dexterity Index (GDI), show good test-retest reliability for rehabilitation professionals.

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Last Updated: Feb 26, 2026

Human Egg Maturity Assessment and Its Clinical Application

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Area of Science:

Rehabilitation Medicine
Biomedical Engineering
Human Motor Control

Background:

Hand assessment is crucial for rehabilitation professionals to guide therapy and track patient recovery.
The Virtual Eggs Test (VET) assesses fine and gross hand dexterity, incorporating speed and grip force accuracy.
Previous VET validation identified areas for protocol improvement.

Purpose of the Study:

To present an updated protocol and outcome measures (Fine Dexterity Index - FDI, Gross Dexterity Index - GDI) for the Virtual Eggs Test (VET).
To collect normative data and evaluate the test-retest reliability of the updated VET in healthy individuals.
To establish the VET's utility in evaluating hand function over time.

Main Methods:

A clinical trial was conducted with 79 healthy participants, stratified by age.
Participants underwent repeated VET assessments to evaluate test-retest reliability.
Intraclass Correlation Coefficients (ICCs) were calculated for FDI and GDI.

Main Results:

No significant differences were found between test and retest for both FDI and GDI.
FDI demonstrated excellent reliability (ICCs 0.90-0.91).
GDI showed moderate reliability (ICCs 0.63-0.64).

Conclusions:

The updated VET protocol and its outcome measures (FDI and GDI) are reliable for assessing hand function over time.
The VET is particularly effective for evaluating hand function in tasks requiring delicate object manipulation.
The VET provides a reliable tool for monitoring hand recovery in clinical rehabilitation settings.