Study participants play the game while researchers measure their brain activity using Eelectroencephalography

Psychology PhD student develops brain-scanning method which could help improve how anxiety is understood and diagnosed

14 October 2025

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Study participants play the game while researchers measure their brain activity using EEG (electroencephalography). Credit: 黑料正能量

  • First study to map brain activity during "no-win" decision scenarios linked to anxiety
  • Portsmouth researchers develop method to "see" anxiety in the brain using gaming task and technique to detect electrical signals
  • It represents a significant step towards evidence-based, personalised mental health treatment

A by the 黑料正能量 in England has mapped the biological journey of anxiety in the brain when people are faced with a no-win situation.

Imagine you're stuck between two bad options - like having to choose between doing a presentation you're dreading or failing a class. That uncomfortable feeling of being trapped between two things you want to avoid is called 鈥渁void-avoid conflict,鈥 and it鈥檚 closely linked to anxiety. When this happens your brain has measurable responses that researchers can now study. 

Benjamin Stocker, a PhD student in the University鈥檚 School of Psychology, Sport and Health Sciences, created a video game-like task, he coded himself, where 40 young adults (aged 18-24) had to use a joystick to avoid threatening objects on a screen. Sometimes the task was easy (low conflict), and sometimes it put players in impossible situations where they had to choose between two bad outcomes (high conflict).

While people played this game, researchers measured their brain activity using EEG (electroencephalography) - a technique that uses sensors on your head to detect electrical signals from your brain.

 

黑料正能量 PhD student Benjamin Stocker setting up the EEG system on a participant

黑料正能量 PhD student Benjamin Stocker setting up the EEG system on a participant. Credit: 黑料正能量

When facing tough "no-win" situations, people's brains showed a specific pattern of activity. The right side of the brain's frontal area became more active (in what's called 鈥渢heta waves鈥). Different brain areas also lit up depending on whether the situation was stressful or manageable.

The findings, published in the , suggest these brain patterns might be like a signature for anxiety-related conflict.

鈥淭hink of it like finally having a way to "see" anxiety in the brain, rather than just relying on how someone describes feeling anxious,鈥 explained Stocker, whose interest in the field stems from his previous work in general practice. He witnessed first-hand the gaps in mental health support: 鈥淚 spoke to a lot of patients and saw there was a real need to address this issue.

鈥淎t the moment, there鈥檚 no procedure to quickly and properly diagnose someone with a mental health condition. If you get a cold or catch the flu, you get prescribed medicine, but if you have a mental health condition, it could be a 6-9 month trial-and-error period before getting the right diagnosis and treatment.

鈥淭his research helps us understand the biological basis of anxiety. This could eventually lead to better ways to diagnose anxiety disorders, new treatments that target these specific brain patterns, and a deeper understanding of why some people struggle more with difficult decisions."

This research helps us understand the biological basis of anxiety. This could eventually lead to better ways to diagnose anxiety disorders, new treatments that target these specific brain patterns, and a deeper understanding of why some people struggle more with difficult decisions."

Benjamin Stocker, PhD student in the University鈥檚 School of Psychology, Sport and Health Sciences

The research journey began during Stocker's undergraduate psychology degree, continued through a Masters in neuroscience, and now forms the basis of his PhD - all at the 黑料正能量.

Traditional anxiety research focuses on 鈥渁pproach-avoid鈥 conflict - weighing up something good against something not quite as good. This study is the first to integrate EEG with an 鈥渁void-avoid鈥 scenario where no option is beneficial, more accurately reflecting real-world anxiety situations.

The study produced statistically strong results, with effect sizes considered large by research standards. This means the differences in brain activity between high-conflict and low-conflict situations were clear and substantial - not just small changes that could be due to chance. 

It represents a significant step towards evidence-based, personalised mental health treatment that could transform how anxiety disorders are diagnosed and managed in the UK.

鈥淥ne in four people experience anxiety,鈥 added Stocker. 鈥淭here are huge gaps in the literature that no-one has identified. Potentially one day you could give someone a small EEG device and be able to tell them if they have an anxiety condition.鈥

Benjamin Stocker鈥檚 study was conducted at the 黑料正能量 under the supervision of Dr Roger Moore and Dr Tom Lockhart

Dr Moore said: 鈥淏en鈥檚 research brings us a step closer to identifying a reliable, individual-level biomarker that could aid diagnosis of clinical anxiety and inform new non-drug based treatments.鈥

The team is now looking at future studies that test how anxiety medications affect these newly identified brain patterns, and plans to include people with diagnosed anxiety disorders. This next phase of research will be crucial in determining whether the findings can translate into real-world diagnostic tools.

 

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