Tunnel vision refers to the tendency of individuals within the criminal justice system to utilize shortcuts, selectively filtering evidence to construct a case aimed at convicting a suspect. Confirmation bias, on the other hand, involves favoring information that aligns with one’s preconceptions regardless of its accuracy. The current study investigated the combined impact of these biases on Israeli police investigators and laypeople in hypothetical criminal investigation scenarios. Results revealed that police investigators were more significantly influenced by tunnel vision compared to laypersons. Despite this, investigators did not disregard exonerating evidence and adjusted their confidence in the suspect’s guilt when presented with such information.
This phenomenon has been extensively studied and intersects with other psychological concepts such as groupthink and confirmation bias. As humans, we form our own assumptions and attitudes, which naturally influence our thought processes.
Andy Reggio was a police detective and is now a private investigator in Dallas.
