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When I was asked to give an impromptu short talk and then subtract sequentially in steps of 17 – all in front of a panel of three strangers – the acute stress was written on my face.

The reason was that researchers were documenting this somewhat terrifying situation for a scientific study that is analyzing anxiety using thermal cameras.

Tension changes the blood distribution in the facial area, and researchers have found that the cooling effect of a subject's face can be used as a gauge of anxiety and to observe restoration.

Thermal imaging, as stated by the scientists behind the study could be a "revolutionary development" in anxiety studies.

The Experimental Stress Test

The experimental stress test that I underwent is meticulously designed and purposely arranged to be an unexpected challenge. I came to the university with minimal awareness what I was in for.

To begin, I was told to settle, calm down and listen to white noise through a audio headset.

So far, so calming.

Afterward, the scientist who was overseeing the assessment introduced a panel of three strangers into the space. They each looked at me quietly as the investigator stated that I now had three minutes to develop a five minute speech about my "ideal career".

When noticing the warmth build around my collar area, the researchers recorded my face changing colour through their thermal camera. My nasal area rapidly cooled in temperature – turning blue on the infrared display – as I contemplated ways to bluster my way through this impromptu speech.

Study Outcomes

The scientists have conducted this identical tension assessment on multiple participants. In every case, they observed the nasal area dip in temperature by a noticeable amount.

My nasal area cooled in heat by two degrees, as my biological response system pushed blood flow away from my nasal region and to my visual and auditory organs – a physiological adaptation to enable me to look and listen for hazards.

Nearly all volunteers, similar to myself, recovered quickly; their noses warmed to pre-stressed levels within a few minutes.

Lead researcher noted that being a journalist and presenter has probably made me "somewhat accustomed to being subjected to tense situations".

"You are used to the camera and conversing with unknown individuals, so you're probably relatively robust to social stressors," the scientist clarified.

"Nevertheless, even people with your background, experienced in handling tense circumstances, demonstrates a physiological circulation change, so this indicates this 'nose temperature drop' is a consistent measure of a shifting anxiety level."

Stress Management Applications

Tension is inevitable. But this finding, the scientists say, could be used to aid in regulating harmful levels of tension.

"The duration it takes someone to recover from this temperature drop could be an reliable gauge of how efficiently somebody regulates their stress," noted the principal investigator.

"Should they recover unusually slowly, could that be a potential indicator of psychological issues? Is it something that we can tackle?"

As this approach is non-intrusive and records biological reactions, it could furthermore be beneficial to observe tension in infants or in those with communication challenges.

The Mathematical Stress Test

The subsequent challenge in my tension measurement was, in my view, even worse than the initial one. I was instructed to subtract in reverse starting from 2023 in steps of 17. A member of the group of unresponsive individuals stopped me each instance I made a mistake and told me to begin anew.

I acknowledge, I am bad at calculating mentally.

As I spent awkward duration striving to push my mind to execute subtraction, all I could think was that I desired to escape the increasingly stuffy room.

Throughout the study, merely one of the 29 volunteers for the anxiety assessment did genuinely request to exit. The remainder, similar to myself, completed their tasks – likely experiencing assorted amounts of embarrassment – and were rewarded with a further peaceful interval of background static through audio devices at the finish.

Non-Human Applications

Perhaps one of the most surprising aspects of the approach is that, as heat-sensing technology measure a physical stress response that is natural to numerous ape species, it can also be used in animal primates.

The scientists are currently developing its application in habitats for large monkeys, such as chimps and gorillas. They seek to establish how to decrease anxiety and boost the health of animals that may have been removed from distressing situations.

The team has already found that displaying to grown apes video footage of young primates has a soothing influence. When the scientists installed a display monitor near the rescued chimps' enclosure, they observed the nasal areas of animals that watched the material heat up.

Consequently, concerning tension, watching baby animals engaging in activities is the contrary to a surprise job interview or an spontaneous calculation test.

Future Applications

Implementing heat-sensing technology in ape sanctuaries could demonstrate itself as useful for assisting rehabilitated creatures to adapt and acclimate to a unfamiliar collective and strange surroundings.

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