Scientists Map Psychological Signature of People with Extremist Tendencies

Bikes are seen outside Cambridge University, as the spread of the coronavirus disease (COVID-19) continues, Cambridge, Britain, April 1, 2020. (Reuters)
Bikes are seen outside Cambridge University, as the spread of the coronavirus disease (COVID-19) continues, Cambridge, Britain, April 1, 2020. (Reuters)
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Scientists Map Psychological Signature of People with Extremist Tendencies

Bikes are seen outside Cambridge University, as the spread of the coronavirus disease (COVID-19) continues, Cambridge, Britain, April 1, 2020. (Reuters)
Bikes are seen outside Cambridge University, as the spread of the coronavirus disease (COVID-19) continues, Cambridge, Britain, April 1, 2020. (Reuters)

Researchers at the University of Cambridge have mapped an underlying "psychological signature" for people who are predisposed to holding extreme social, political or religious attitudes, and support violence in the name of ideology.

Approaches to radicalization policy mainly rely on basic demographic information such as age, race and gender. By adding cognitive and personality assessments, the psychologists created a statistical model that is between four and fifteen times more powerful at predicting ideological worldviews than demographics alone. Scientists believe this model could be a psychological signature that helps identify people with extremist tendencies.

The researchers conducted a series of follow-up tests on 334 of the original participants, using a further 16 surveys to determine attitudes and strength of feeling towards various ideologies. They created a model including a mix of personality traits and mental characteristics such as poorer working memory and slower “perceptual strategies” - the unconscious processing of changing stimuli, such as shape and color - as well as tendencies towards impulsivity and sensation seeking. The results were published in the Philosophical Transactions of the Royal Society on February 22.

Psychologists found that conservatism is linked to cognitive “caution”: slow-and-accurate unconscious decision-making, compared to the fast-and-imprecise "perceptual strategies" found in more liberal minds.

They also found that brains of more dogmatic people are slower to process perceptual evidence, but they are more impulsive personality-wise.

Researchers say that, while still in early stages, this research could help to better identify and support people most vulnerable to radicalization across the political and religious spectrum.

“Subtle difficulties with complex mental processing may subconsciously push people towards extreme doctrines that provide clearer, more defined explanations of the world, making them susceptible to toxic forms of dogmatic and authoritarian ideologies. We are interested in the role that hidden cognitive functions play in sculpting ideological thinking. We think our study will be useful in this context,” said Dr. Leor Zmigrod, lead author from Cambridge's Department of Psychology in a report on the university's website.



From Deluges to Drought: Climate Change Speeds up Water Cycle, Triggers More Extreme Weather

People walk through a part of the Amazon River that shows signs of drought, in Santa Sofia, on the outskirts of Leticia, Colombia, Oct. 20, 2024. (AP)
People walk through a part of the Amazon River that shows signs of drought, in Santa Sofia, on the outskirts of Leticia, Colombia, Oct. 20, 2024. (AP)
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From Deluges to Drought: Climate Change Speeds up Water Cycle, Triggers More Extreme Weather

People walk through a part of the Amazon River that shows signs of drought, in Santa Sofia, on the outskirts of Leticia, Colombia, Oct. 20, 2024. (AP)
People walk through a part of the Amazon River that shows signs of drought, in Santa Sofia, on the outskirts of Leticia, Colombia, Oct. 20, 2024. (AP)

Prolonged droughts, wildfires and water shortages. Torrential downpours that overwhelm dams and cause catastrophic flooding.

Around the globe, rising temperatures stoked by climate change are increasing the odds of both severe drought and heavier precipitation that wreak havoc on people and the environment.

Rainfall can disappear for years only to return with a vengeance, as it did in California in 2023, with record-setting rain and snowfall. That led to heavy vegetation growth that provided fuel for the devastating January wildfires in Los Angeles after drought returned.

But how can global warming cause both drier and wetter extremes? Here's what experts say:

It's all about the water cycle

Water constantly moves between the Earth and its atmosphere. But that system — called the hydrological cycle — is speeding up as global temperatures get hotter, primarily due to the burning of fossil fuels like coal and gas.

A hotter atmosphere sucks up more water vapor from bodies of water and vegetation and soil.

Over land, this atmospheric demand and loss of surface moisture leads to longer and more intense droughts, even causing some arid areas to expand. Though rain falls less often, when it does, it's often in intense and destructive deluges.

That's because the atmosphere holds 7% more water vapor for every degree Celsius.

“Basically, global warming is turning the atmosphere into a bigger sponge so it can soak up more moisture ... and then when the conditions are right for rainfall, it’s like squeezing that sponge,” said Jonathan Overpeck, a climate scientist at the University of Michigan. "You get more moisture coming out faster."

Oceans play outsized role

Oceans absorb most of the planet’s extra heat. That causes the water to expand and ice to melt at the poles, raising sea levels. The warmer water also provides fuel for larger hurricanes and cyclones that can dump massive amounts of water in a short time.

In 2023, for example, heavy one-day rains from Mediterranean storm Daniel caused massive flooding across eastern Libya that overwhelmed two dams, sending a wall of water through the coastal city of Derna that destroyed entire neighborhoods and swept bridges, cars and people out to sea. Climate scientists say climate change made that storm far more likely.

Snowpack is diminishing

Climate change also is affecting snowpack, a critical part of the hydrological cycle.

Melting snow helps fill reservoirs and waterways, including for drinking and agriculture. But less snow is falling in general, and what does often is absorbed by thirsty soil.

What's more, because winters are becoming warmer overall, the growing season is longer, meaning snowmelt also is being lost through evapotranspiration of plants. But, just like rain, climate change also can cause more intense and sometimes damaging snowstorms.

“All this stuff is related to warming, which we know with perfect confidence is almost all due to human activity,” Overpeck said. “The good news is, we know how to stop it if we want to.”