The STRONG Study: A Multi-Tiered, Multimodal Investigation of Resilience and Recovery Following Prolonged Collective Adversity
The STRONG Study is a multi-tiered, multimodal investigation in Israel that integrates nationally representative longitudinal data with in-depth neurobehavioral and neuroimaging assessments to identify the mechanisms underlying resilience and recovery following the prolonged collective adversity of the October 7, 2023 attacks.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of a preprint that has not been peer-reviewed. It is not medical advice. Do not make health decisions based on this content. Read full disclaimer
Human beings possess a remarkable capacity to endure hardship. When faced with sudden disaster or prolonged crisis, most people do not break; instead, they adapt, finding ways to maintain their mental well-being or recover quickly from the initial shock. This ability to bend without snapping is known as resilience. For decades, scientists have focused heavily on why some people develop lasting mental health struggles after trauma, studying the factors that lead to illness. However, far less is known about the active processes that allow the majority of people to stay healthy or bounce back. Understanding these mechanisms is crucial, especially as the world faces more frequent large-scale crises, from wars to pandemics. The question is no longer just who gets sick, but how and why so many others remain strong.
In the wake of the devastating attacks on October 7, 2023, and the prolonged national adversity that followed, a team of researchers in Israel launched a massive effort to answer these questions. They call their project STRONG, which stands for Stress and Trauma Resilience: Opportunities for National Growth. Rather than looking at resilience as a fixed personality trait, the researchers view it as a dynamic process that unfolds over time and involves many different parts of a person's life. Their study is designed to track thousands of people over several years, combining broad surveys with deep, detailed examinations of how the brain and body work under stress. The goal is to build a complete picture of what helps people recover, moving beyond simple checklists to understand the complex interplay between a person's mind, their biology, their community, and their society.
The study is built in three connected layers, each digging deeper than the last. The first and largest layer, STRONG-1, is a long-term survey of approximately 4,600 Israeli adults. These participants are being asked to share their experiences and mental health status five times over the course of three years. The researchers are gathering information on everything from their personal history of trauma and their current symptoms of anxiety or depression to their physical health, their relationships, and their trust in national institutions. By asking these questions repeatedly, the team can map out different paths people take: some remain stable, some recover quickly, some struggle for a long time, and a few develop symptoms later on. This approach allows the scientists to see resilience not as a single moment, but as a journey that changes over time.
From this large group, the researchers will select a smaller, more focused group of about 120 people for the second layer, STRONG-2. They will choose roughly equal numbers of individuals who have shown exceptional resilience and those who have remained highly vulnerable, matching them carefully on factors like age and background. These participants will come to a laboratory to undergo a series of tests. Here, the researchers will observe how their bodies and minds react to stress in real-time. They will measure heart rate, track eye movements, and watch how people make decisions when faced with rewards or punishments. They will also use mobile technology to check in on these individuals throughout their daily lives, capturing how they cope with stress as it happens. This part of the study moves from asking people what they feel to observing how they actually function under pressure.
The final layer, STRONG-3, takes the most resilient and most vulnerable individuals from the second group into a magnetic resonance imaging scanner. This allows the team to look directly at the structure and activity of the brain. They will examine specific areas known to be involved in emotion and memory, such as the hippocampus and the prefrontal cortex, to see if there are physical differences between those who recover well and those who do not. While the participants are in the scanner, their heart rates and eye movements will be recorded again, synchronized with the brain images. This creates a rare opportunity to link what happens inside the brain with what happens in the body and in the real world, all while the person is navigating a difficult situation.
What makes this project unique is that it does not treat these layers as separate studies. Instead, it weaves them together into a single, unified investigation. The researchers plan to use advanced computer models to combine the survey data, the behavioral tests, and the brain scans. This integration is designed to reveal how different factors work together. For instance, they want to know if a person's ability to regulate their emotions is supported by a strong social network, or if a specific brain pattern helps someone stay calm even when they feel isolated. By looking at individual, social, and societal factors all at once, the study aims to identify the specific ingredients that make up resilience.
The researchers are careful to note that this is a living project. The initial survey has been completed, but the detailed plans for the laboratory and brain imaging parts are still being finalized. They acknowledge that studying a population facing ongoing war and uncertainty presents unique challenges, such as keeping people engaged over three years or measuring the cumulative weight of repeated alarms and displacement. However, by using a nested design that starts with a broad national sample and narrows down to deep biological insights, they hope to overcome these hurdles. The ultimate aim is not just to describe who is resilient, but to explain the mechanisms that allow resilience to emerge. If successful, this work could provide a blueprint for helping communities and individuals build stronger defenses against future adversity, turning the science of recovery into practical tools for public health.
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