Autistic juvenile defendants: How defendant race and offense type affect juror decisions

Area of Science:

• Legal Psychology
• Neurodevelopmental Disorders
• Criminal Justice

Background:

• Understanding how laypersons perceive juvenile defendants with autism spectrum disorder (ASD) is crucial for fair legal proceedings.
• Existing research often overlooks the intersection of neurodevelopmental diagnoses, offense type, and race in legal decision-making.

Purpose of the Study:

• To investigate the impact of a juvenile defendant's autism spectrum disorder (ASD) diagnosis, offense type (violent/nonviolent), and race on mock jurors' credibility evaluations and legal decisions.
• To examine whether credibility perceptions mediate the influence of these defendant characteristics on verdicts and sentencing.

Main Methods:

• A mock-juror study involving 466 participants who evaluated vignettes of juvenile defendants.
• Experimental manipulation of defendant's ASD diagnosis (present vs. absent), race (White vs. Black), and offense type (violent vs. nonviolent).

Main Results:

• Defendants with an ASD diagnosis were significantly less likely to receive guilty verdicts and received more lenient sentences, even for violent offenses.
• ASD diagnosis positively influenced perceptions of defendant likability, honesty, and believability, mediating sentencing leniency.
• White defendants were found guilty more often and with greater certainty compared to Black defendants.

Conclusions:

• Defendant characteristics, including ASD diagnosis and race, significantly influence laypersons' legal judgments, underscoring the complexity of these perceptions in the criminal justice system.
• Findings emphasize the need for judicial education on ASD and clear guidelines for presenting neurodevelopmental information in court.
• Further research is warranted to explore the intricate relationship between race, neurodevelopmental diagnoses, and legal outcomes.