Medindia

X

Forensic Sciences are 'Fraught With Error': Study

by Rukmani Krishna on  April 26, 2013 at 11:42 PM General Health News   - G J E 4
Various high-profile false convictions were reviewed by a target article recently published in Journal of Applied Research in Memory and Cognition (JARMAC). It provides an overview of classic psychological research on expectancy and observer effects and indicates in which ways forensic science examiners may be influenced by information such as confessions, eyewitness identification, and graphical evidence.
 Forensic Sciences are 'Fraught With Error': Study
Forensic Sciences are 'Fraught With Error': Study
Advertisement

The target article authors, Saul Kassin and Jeff Kukucka, of John Jay College of Criminal Justice, and Itiel Dror, University College, London, point out that when the instrument of analysis is a human examiner, then even evidence considered by the public to be highly objective, such as fingerprint evidence, is actually subjective in its judgment. Therefore, they argue, there is a potential for confirmation bias because psychological research shows that "people tend to seek, perceive, interpret, and create new evidence in ways that verify their preexisting beliefs."

Advertisement
The authors reveal that even DNA evidence, more famously known for exonerating wrongfully convicted people, has contributed to false convictions, especially when other, flawed, evidence chronologically precedes it, such as a mistaken eyewitness identification or false confession.

"Popular TV programs, such as CSI: Crime Scene Investigation, communicate a false belief in the powers of forensic science, a problem that can be exacerbated when forensic science experts overstate the strength of the evidence," explained leading author, Saul Kassin.

The study does not just point out flaws - it details many things that can be done to limit or avoid these problems, both during an investigation and during a trial. The authors propose various best practice recommendations to reduce confirmation biases. During the investigation, for example, an easy solution would be to shield forensic examiners from everything other than the evidence they are examining. This minimizes chances of fitting the evidence to a known suspect.

"The target article describes an important force that has the potential to erode the quality of our judicial system. Solving the problem will require psychological researchers, legal scholars and forensic scientists communicating with one another- a process that is fostered by the exchange of ideas," says Ronald Fisher, Editor-in-Chief of JARMAC, and Professor of psychology at Florida International University.

Source: Eurekalert
Advertisement

Post your Comments

Comments should be on the topic and should not be abusive. The editorial team reserves the right to review and moderate the comments posted on the site.
User Avatar
* Your comment can be maximum of 2500 characters
Notify me when reply is posted I agree to the terms and conditions

You May Also Like

Advertisement
View All

More News on: