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Stress is usually associated with what is happening around us, but one influential psychology study suggests that how people see themselves also shapes how the body responds under pressure. In a 2005 experiment, found that participants who spent a few minutes reflecting on their most important personal values before completing a stressful laboratory task showed significantly lower cortisol responses than those in a control group. Because cortisol is one of the body’s primary stress hormones, the findings suggested that a brief values-affirmation exercise could reduce the body’s biological response to acute stress without changing the stressful situation itself.

The study focused on how people interpreted stress

Participants first completed a short writing exercise. One group reflected on personal values that mattered most to them, while the control group wrote about values that were less personally important. Everyone then completed the same laboratory stress challenge, but those who had reflected on their own values showed a smaller cortisol response .

The researchers argued that reconnecting with important personal values reduced the sense of threat associated with the upcoming task. The exercise did not eliminate stress or make the challenge easier; instead, it appeared to change how participants approached the situation before their body’s stress response fully developed.

Later research reached similar conclusions

The 2005 findings have since influenced a large body of research on self-affirmation and stress. Another review examining the neuroscience of self-affirmation, published in , concluded that reflecting on personally important values consistently helps people cope with stress and has been linked to healthier psychological and physiological responses across a variety of settings.

Another experimental study examining social-evaluative stress, published in , found that participants who completed a values-affirmation exercise showed reduced biological signs of stress during a laboratory challenge, supporting the idea that affirming core values can influence more than subjective feelings alone.

Values do not remove stress, but they can change the response

The research does not suggest that writing about personal values eliminates stress or prevents difficult situations from occurring. Instead, it indicates that reconnecting with what matters most may help people approach stressful events from a more secure psychological position, making the body’s stress response less intense.

That distinction explains why value affirmation continues to attract attention in psychology. The intervention is brief, inexpensive, and easy to apply, yet the evidence suggests it can measurably influence how people respond when pressure arises.

The 2005 Creswell study remains one of the strongest demonstrations that psychological meaning can influence biological stress responses. Participants who reflected on their personal values before a stressful task showed lower cortisol levels than those in the control group, and later studies have repeatedly supported the idea that values affirmation helps buffer stress in demanding situations. Rather than removing life’s pressures, reconnecting with core values appears to help people face those pressures with a steadier physiological and psychological response.