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

Search research articles

Related Experiment Video

Updated: Jul 6, 2026

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Published on: January 31, 2025

Repeatability and reproducibility of earprint acquisition.

Ivo Alberink¹, Arnout Ruifrok

¹Department of Digital Technology and Biometry, Netherlands Forensic Institute, Den Haag, The Netherlands. i.alberink@nfi.minjus.nl

Journal of Forensic Sciences

|March 28, 2008

Summary

Operator variability impacts forensic earprint identification accuracy. Training and careful data collection are crucial to minimize errors in forensic identification, ensuring reliable results.

Related Concept Videos

You might also read

Related Articles

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

Sort by

Same author

A uniform approach to determine measurement uncertainty in routine chemical forensic casework.

Journal of forensic sciences·2025

Same author

From understanding to justifying: Computational reliabilism for AI-based forensic evidence evaluation.

Forensic science international. Synergy·2024

Same author

Improving the evidential value of low-quality face images with aggregation of deep neural network embeddings.

Science & justice : journal of the Forensic Science Society·2024

Same author

From data to a validated score-based LR system: A practitioner's guide.

Forensic science international·2024

Same author

Automated interpretation of comparison scores for firearm toolmarks on cartridge case primers.

Forensic science international·2023

Same author

Measuring the rarity of core-delta distances in fingerprint patterns in the Dutch population.

Journal of forensic sciences·2023

Area of Science:

Forensic Science
Biometrics
Pattern Recognition

Background:

Operator dependency is a critical factor in manual forensic identification processes across various disciplines.
Earprint identification, a subjective forensic method, requires standardized procedures for reliable analysis.
Previous research has highlighted the need to assess repeatability and reproducibility in forensic data acquisition.

Purpose of the Study:

To evaluate the impact of different operators on the quality and accuracy of earprint acquisition.
To quantify the error rates associated with earprint matching based on operator variability.
To investigate the influence of print acquisition timing on the similarity of matching earprints.

Main Methods:

Collected a database of 1229 donors with three earprints per ear between 2002-2005.

More Related Videos

Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision

Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision

Published on: April 29, 2014

Three-dimensional Optical-resolution Photoacoustic Microscopy

Three-dimensional Optical-resolution Photoacoustic Microscopy

Published on: May 3, 2011

Related Experiment Videos

Last Updated: Jul 6, 2026

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Published on: January 31, 2025

Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision

Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision

Published on: April 29, 2014

Three-dimensional Optical-resolution Photoacoustic Microscopy

Three-dimensional Optical-resolution Photoacoustic Microscopy

Published on: May 3, 2011

Established a "best practice" protocol for earprint acquisition.

Tested repeatability and reproducibility of the print acquisition process by different operators.

Main Results:

Different operators acquired earprints of varying quality, leading to equal error rates ranging from 9% to 19%.
Earprints acquired consecutively were found to be more similar than those taken on separate occasions.
Operator effects significantly influence the reliability of earprint identification systems.

Conclusions:

Operator training and standardized "best practice" protocols are essential for accurate earprint identification.
Minimizing operator-induced variability is crucial for reducing error rates in forensic biometrics.
Reference earprint material should not be collected on the same occasion to avoid artificial similarity.