Skip to content

A practical tool for information management in forensic decisions: Using Linear Sequential Unmasking-Expanded (LSU-E) in casework

Journal: Forensic Science International: Synergy
Published: 2022
Primary Author: Adele Quigley-McBride
Secondary Authors: Itiel E. Dror, Tiffany Roy, Brandon L. Garrett, Jeff Kukucka

Forensic analysts often receive information from a multitude of sources. Empirical work clearly demonstrates that biasing information can affect analysts’ decisions, and that the order in which task-relevant information is received impacts human cognition and decision-making. Linear Sequential Unmasking (LSU; Dror et al., 2015) and LSU-Expanded (LSU-E; Dror & Kukucka, 2021) are examples of research-based procedural frameworks to guide laboratories’ and analysts’ consideration and evaluation of case information. These frameworks identify parameters—such as objectivity, relevance, and biasing power—to prioritize and optimally sequence information for forensic analyses. Moreover, the LSU-E framework can be practically incorporated into any forensic discipline to improve decision quality by increasing the repeatability, reproducibility, and transparency of forensic analysts’ decisions, as well as reduce bias. Future implementation of LSU and LSU-E in actual forensic casework can be facilitated by concrete guidance. We present here a practical worksheet designed to bridge the gap between research and practice by facilitating the implementation of LSU-E.

Related Resources

Extracting Case-Specific Data from Validation Studies

Extracting Case-Specific Data from Validation Studies

This CSAFE webinar was held on May 10, 2022. Presenters: Steve Lund Statistical Engineering Division, NIST Hari Iyer Statistical Engineering Division, NIST Presentation Description: The legal and scientific communities agree…
Shining a Light on Black Box Studies

Shining a Light on Black Box Studies

This CSAFE webinar was held on April 22, 2022. Presenters: Dr. Kori Khan Iowa State University Dr. Alicia Carriquiry Iowa State University Presentation Description: The American criminal justice system heavily…
Sampling for Forensic Practitioners Short Course

Sampling for Forensic Practitioners Short Course

This three-session short course took place on March 25, April 1, and April 8, 2022. Recordings of completed sessions and practicum materials can be found below. Presenters: Alicia Carriquiry Director…
Modeling And iNventory of Tread Impression System (MANTIS): The development, deployment and application of an active footwear data collection system

Modeling And iNventory of Tread Impression System (MANTIS): The development, deployment and application of an active footwear data collection system

This CSAFE webinar was held on March 24, 2022. Presenters: Dr. Richard Stone Iowa State University Dr. Susan Vanderplas University of Nebraska, Lincoln Presentation Description: This webinar details the development,…