Human factors in triaging forensic items: Casework pressures and ambiguity aversion

Area of Science:

• Forensic Science
• Cognitive Psychology

Background:

• Effective triaging of crime scene items is crucial for forensic analysis.
• Casework pressures and individual tolerance for ambiguity can influence decision-making.

Purpose of the Study:

• To evaluate the impact of casework pressures and ambiguity tolerance on the triaging of forensic evidence.
• To identify factors contributing to inconsistencies in forensic evidence triaging.

Main Methods:

• Development of a realistic pressure manipulation paradigm in an online setting.
• Assessment of triaging decisions among forensic experts and non-experts under induced pressure.
• Analysis of the role of ambiguity aversion in decision-making processes.

Main Results:

• Pressure manipulation did not significantly alter triaging decisions for either experts or non-experts.
• Significant inconsistencies in triaging decisions were observed, even among experts with similar backgrounds and under identical conditions.
• Ambiguity aversion emerged as a potentially significant factor influencing early case impressions.

Conclusions:

• Casework pressure does not appear to be the primary driver of inconsistencies in forensic triaging.
• Individual differences, particularly ambiguity aversion, may play a more critical role in decision-making.
• Findings suggest a need for policy development to enhance consistency in forensic triaging procedures.