Jurors’ perceptions of scientific testimony: The role of gender and testimony complexity in trials involving DNA evidence

Abstract

With continuous advancements in forensic science, expert testimony has become more common in criminal proceedings. This study (N = 170) sought to examine the combined influence of mock juror gender, expert gender, and testimony complexity in a case involving DNA (deoxyribonucleic acid) evidence. Findings revealed that testimony complexity interacted with expert gender to influence verdict judgments. Participants were unaffected by testimony complexity when the expert was a man, but were more likely to convict when complex testimony was presented by a woman. In support of the heuristic-systematic model, expert gender elicited an effect only in high-complexity conditions—interestingly, this was exclusively the case for male mock jurors. Understanding how jurors cognitively process legal and extra-legal information may help legal actors (e.g., evidence experts, lawyers) communicate evidence and its legal relevance more effectively.

Keywords

• gender
• testimony complexity
• dna evidence
• verdict