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When I was asked to give an impromptu brief presentation and then calculate in reverse in steps of 17 – while facing a group of unfamiliar people – the sudden tension was visible in my features.

The reason was that researchers were recording this rather frightening scenario for a research project that is studying stress using heat-sensing technology.

Stress alters the blood distribution in the facial area, and researchers have found that the thermal decrease of a subject's face can be used as a gauge of anxiety and to monitor recovery.

Thermal imaging, according to the psychologists behind the study could be a "revolutionary development" in tension analysis.

The Experimental Stress Test

The scientific tension assessment that I participated in is meticulously designed and purposely arranged to be an unexpected challenge. I arrived at the university with little knowledge what I was in for.

To begin, I was told to settle, calm down and listen to background static through a pair of earphones.

So far, so calming.

Subsequently, the investigator who was overseeing the assessment introduced a trio of unknown individuals into the area. They each looked at me quietly as the researcher informed that I now had three minutes to create a short talk about my "ideal career".

While experiencing the heat rise around my throat, the scientists captured my skin tone shifting through their infrared device. My nose quickly dropped in warmth – appearing cooler on the heat map – as I considered how to bluster my way through this impromptu speech.

Research Findings

The investigators have performed this identical tension assessment on numerous subjects. In each, they noticed the facial region dip in temperature by between three and six degrees.

My facial temperature decreased in heat by two degrees, as my biological response system redirected circulation from my face and to my visual and auditory organs – a bodily response to enable me to see and detect for danger.

Most participants, like me, returned to normal swiftly; their facial temperatures rose to pre-stressed levels within a short time.

Head scientist explained that being a journalist and presenter has probably made me "relatively adapted to being put in anxiety-provoking circumstances".

"You're familiar with the camera and talking with strangers, so you're likely quite resilient to public speaking anxieties," the researcher noted.

"However, even individuals such as yourself, accustomed to being stressful situations, demonstrates a physiological circulation change, so this indicates this 'facial cooling' is a robust marker of a changing stress state."

Anxiety Control Uses

Stress is part of life. But this discovery, the researchers state, could be used to help manage harmful levels of tension.

"The length of time it takes an individual to bounce back from this nasal dip could be an objective measure of how effectively a person manages their stress," said the principal investigator.

"If they bounce back unusually slowly, could that be a potential indicator of anxiety or depression? Could this be a factor that we can address?"

Because this technique 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, personally, even worse than the initial one. I was asked to count in reverse starting from 2023 in increments of seventeen. One of the observers of three impassive strangers stopped me each instance I made a mistake and asked me to begin anew.

I admit, I am poor with mental arithmetic.

As I spent awkward duration attempting to compel my brain to perform arithmetic operations, all I could think was that I wanted to flee the increasingly stuffy room.

During the research, merely one of the 29 volunteers for the anxiety assessment did genuinely request to exit. The others, similar to myself, finished their assignments – presumably feeling assorted amounts of discomfort – and were given a further peaceful interval of white noise through earphones at the end.

Animal Research Applications

Possibly included in the most surprising aspects of the method is that, since infrared imaging record biological tension reactions that is natural to many primates, it can also be used in other species.

The researchers are currently developing its implementation within refuges for primates, including chimpanzees and gorillas. They aim to determine how to decrease anxiety and enhance the welfare of creatures that may have been saved from distressing situations.

Researchers have previously discovered that presenting mature chimps visual content of baby chimpanzees has a relaxing impact. When the scientists installed a video screen near the rescued chimps' enclosure, they saw the noses of creatures that observed the footage increase in temperature.

Therefore, regarding anxiety, watching baby animals engaging in activities is the contrary to a spontaneous career evaluation or an on-the-spot subtraction task.

Potential Uses

Employing infrared imaging in primate refuges could prove to be valuable in helping rehabilitated creatures to become comfortable to a new social group and unfamiliar environment.

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