Enabling witnesses to actively explore faces and reinstate study-test pose during a lineup increases discriminability

Area of Science:

• Cognitive Psychology
• Forensic Science
• Law Enforcement Technology

Background:

• Accurate witness identification is crucial for police and national security.
• Eyewitness errors can significantly impact investigations.
• Traditional lineup procedures have limitations in optimizing witness accuracy.

Purpose of the Study:

• To evaluate the effectiveness of interactive lineups in improving eyewitness identification accuracy.
• To compare the performance of interactive lineups against traditional photo and video lineup procedures.
• To understand the mechanisms by which interactive lineups enhance discriminability.

Main Methods:

• Participants encoded target faces from different views (front or profile).
• Participants identified targets using interactive, photo, or video lineups (simultaneous or sequential).
• Receiver Operating Characteristics (ROC) analysis and signal-detection modeling were employed.

Main Results:

• Interactive lineups significantly increased discriminability compared to photo and video lineups.
• The benefit of interactive lineups was observed in both front and profile encoding conditions.
• Signal-detection modeling indicated interactive lineups facilitate viewing more diagnostic facial features.

Conclusions:

• Interactive lineups enhance eyewitness identification by enabling active facial feature exploration.
• This procedure offers a promising method to reduce eyewitness errors in legal and investigative contexts.
• Interactive lineups represent an advancement over traditional methods for suspect identification.