Cross-age effects on forensic face construction

Area of Science:

• Cognitive Psychology
• Forensic Science
• Human Factors

Background:

• The own-age bias (OAB) demonstrates enhanced memory for own-age faces compared to other age groups.
• Facial composites are crucial tools in forensic investigations for witness identification.
• Understanding OAB's influence on facial composite construction is vital for improving eyewitness testimony accuracy.

Purpose of the Study:

• To investigate the presence and impact of the own-age bias (OAB) in the construction of facial composites.
• To explore how age influences facial memory and the effectiveness of facial composite generation.
• To assess the implications of OAB for forensic identification procedures.

Main Methods:

• Participants were divided into younger (19-35 years) and older (51-80 years) adult groups.
• Participants constructed facial composites from memory using the PRO-fit system for own-age and cross-age target faces.
• Composite identifiability was assessed by a separate group attempting to name the faces.

Main Results:

• Older adults demonstrated an own-age bias, creating more recognizable composites of own-age targets than cross-age targets.
• Younger adults did not show a significant own-age bias in composite construction.
• Composite quality was not reliably correlated with participants' face perception abilities.

Conclusions:

• The own-age bias affects facial composite construction, particularly for older adults.
• Facial composite systems may benefit from age-specific considerations for older witnesses.
• Findings offer insights into age-related facial memory and have practical implications for forensic science.