12/27/2022 0 Comments Computer screen tunnel![]() Lewinski believes this finding, too, “has important law enforcement implications, concerning the impact of distraction. This study measured reaction time and found, for example, that a driver’s reaction to the brake lights of a car ahead is “significantly slower” if he or she is engaged in a phone conversation. You can click on the photo of Professor Yantis to launch the video or click the link at the end of the printed news release.)Īt Utah, researchers monitored subjects talking on a cell phone while “operating” a visual driving simulator. In a web-posted video explaining his experiments, Yantis references work at the University of Utah that, like his study, would seem to most civilians to have primarily road safety implications. ![]() And we know that these phenomena are real, an unavoidable part of the human condition, not just something cops imagine.” “Likewise, we understand why they may not see something within their field of vision–where their partner was standing, where civilians were–when they are focused on listening to audible stimuli. Now we know why this so-called auditory blocking takes place. “We’ve known for a long time that shooting survivors often don’t hear their rounds going off, can’t remember hearing their partner screaming in their ear, may have perceived their gunshots as puny pops and so on–many sound distortions or omissions. “Their intense focus on a powerful visual stimulus–a threat to their life–causes their brain’s hearing receptors to shut down. “This explains why officers defending themselves in a shooting may not hear things accurately–or at all,” he told Force Science News. Bill Lewinski, executive director of the Force Science Research Center at Minnesota State University-Mankato, sees important law enforcement implications. ![]() Yantis uses this finding, reported in last November’s issue of the Journal of Neuroscience, to explain why cell phone conversations diminish a driver’s visual acuity for what’s happening on the road. The brain can’t simultaneously give full attention to both.” “When attention is deployed to one modality, it necessarily extracts a cost on another modality. In effect, when a subject concentrated on one source of sensory input–looking at something, in this case–that essentially “turned down the volume” on the part of the brain that monitors hearing. ![]() By the same token, when they focused on listening to spoken messages, brain areas that respond to visual images showed diminished activity. They found that when the subjects directed their attention to visual tasks (“tunneling in” on the computer screen), the parts of the brain that record auditory stimuli registered decreased activity. This was intended to simulate “the cluttered visual and auditory input people deal with every day.” Using sophisticated imaging equipment, Yantis and his team recorded the subjects’ brain activity. In a neuroimaging lab, adults ranging in age from 19 to 35 were asked to view a rapidly changing computer display of multiple numbers and letters while listening through headsets to 3 voices simultaneously speaking numbers and letters. of Psychological and Brain Sciences, tracked how the human brain handles competing demands for attention. In both cases, the findings will help advance studies at the Force Science Research Center regarding officer behavior during shootings. ![]() Brain researchers at Johns Hopkins University have shed new light on the auditory blocking and tunnel vision officers often experienced during deadly encounters, while researchers at the University of Utah have surfaced new information related to lag time. ![]()
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