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Objective.  Individual stress tests characterized by social evaluative threat and uncontrollability are known to elicit strong neuroendocrine responses. We tested whether a psychosocial stressor submitted to a larger group of participants (up to 60) may elicit comparable stress responses. Methods.  A total of 59 adult subjects (33 women, 26 men) participated in the study, whereas 24 of them suffered from allergy and 35 were healthy. The stress test consisted of a distraction stress task followed by a speech task, in which the participants were randomly subjected to questions related to a topic that they had to prepare as well as arithmetic questions in front of their peers and a committee that responded in standardized and non-supporting manner. State and trait anxiety inventory (STAI) for anxiety state was administrated before and after the test and salivary samples taking. The test was repeated after five months. Results.  The results showed that the shared psychosocial stress application in a larger group of subjects was prosperous. The larger group test (LGST) resulted in an enhanced subjectively experienced stress and an intensive sympathetic nervous system activation, reflected by elevated salivary alpha-amylase activity and the heart rate. The cortisol increment after exposure to the stress test was not significant. Repeated exposure to the test failed to reproduce the original stress responses with exception of the heart rate rise. Conclusions.  In a larger group of subjects, the psychosocial stress test did elicit stress responses similar to the individual stress tests. Our data indicate that the above-mentioned stress test is apparently not an appropriate approach for the repeated use.

Neuroendocrine responses to a psychosocial stress test for larger groups of participants: comparison of two test exposures