Researchers develop face ‘e-tattoo’to track mental workload in high-stress jobs

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Scientists say that they have formulated a way to help people in stressful and demanding work environments track their brainwaves and brain usage — an electronic tattoo device, or “e-tattoo,” on the person’s face.

In a study posted in the sciencejournal Device, the team of researchers wrote that they found e-tattoos to be a more cost-effective and simpler way to track one’smental workload.

Dr.Nanshu Lu, the senior author of the research from theUniversity of Texas at Austin, wrote that mental workload is a critical factor in human-in-the-loop systems, directly influencing cognitive performance and decision-making.

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Scientists say that they have formulated a way to help people track their brainwaves and brain usage. In a study posted in the journal Device, the team of researchers wrote that they found a more cost-effective and simpler way to track one’s mental workload.

Scientists say that they have formulated a way to help people track their brainwaves and brain usage.In a study posted in the journal Device, the team of researchers wrote that they found a more cost-effective and simpler way to track one’s mental workload.(Dr.Nanshu Lu)

Lu also said ER doctors and robot/drone operators can also leverage this technology for training and performance enhancements. 

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One of the goals of this study was to find a way to measurecognitive fatiguein high leverage and mentally straining careers.

The e-tattoo is temporarily attached to the subject’s forehead, and is smaller than current devices in use today.

According to the study, the device works by usingelectroencephalogram (EEG)and electrooculogram (EOG) to measure both brain waves and eye movements.

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Woman brain electrodes

While most EEG and EOG machines are bulky and expensive, this e-tattoo brings a compact and cost-effective solution to that problem.(iStock)

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While most EEG and EOG machines are bulky and expensive, the e-tattoo offers a compact and cost-effective solution.

Lu wrote that in this study, “we propose a wireless forehead EEG and EOG sensor designed to be as thin and conformable to the skin as a temporary tattoo sticker, which is referred to as aforehead e-tattoo.”

Lualso added that “human mental workload is a crucial factor in the fields of human-machine interactionand ergonomics due to its direct impact on humancognitive performance.“

The way the study was conducted was with six participants being shown a screen on which 20 letters flashed up, one at a time, at various locations. 

Brainwave Scanning Headset test in laboratory

The team found that as the tasks became harder, the different types of brainwaves detected showed shifts in activity that corresponded to a higher mental workload response.(iStock)

Participants were asked to click a mouse if either the letter itself, or its location, matched one shown a given number of letters.

Each participant carried out the task multiple times, corresponding to four levels of difficulty.

The team found that as the tasks became harder, the different types of brainwaves detected showed shifts in activity that corresponded to a higher mental workload response.

Thedevice consists ofa battery pack and reusable chips with a disposable sensor.

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