What is the “CSI effect” in relation to the legal system?

The “CSI effect” refers to the phenomenon where jurors' perceptions and expectations regarding forensic science and evidence are heavily influenced by crime dramas, such as the popular television series "CSI: Crime Scene Investigation." This effect can lead jurors to have unrealistic expectations about the amount and type of forensic evidence that should be presented during trials.

Viewers of these shows are often exposed to dramatized representations of forensic investigations that simplify complex processes, making them more engaging, yet also potentially misleading. Consequently, jurors may expect more definitive forensic evidence to be present in court than is typically available in real-life cases. This can skew their judgment and influence their decisions about guilt or innocence, affecting outcomes in legal proceedings.

The other options, while related to aspects of forensic science and the legal system, do not directly capture the essence of the “CSI effect.” The increased use of DNA evidence and advancements in crime scene technology are developments in the field, while the impact of actual crime rates focuses on external societal factors, rather than the influence of media on jurors' expectations and decisions.