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  • Title: Children's and adults' salivary cortisol responses to an identical psychosocial laboratory stressor.
    Author: Yim IS, Quas JA, Cahill L, Hayakawa CM.
    Journal: Psychoneuroendocrinology; 2010 Feb; 35(2):241-8. PubMed ID: 19615824.
    Abstract:
    Many studies have investigated hypothalamus-pituitary-adrenal (HPA) axis responses to psychosocial stress in adults. In children, much less is known about HPA axis reactivity, and a sizable number of studies has not detected a significant cortisol response. Moreover, there is a lack of studies comparing adults' and children's responses to identical stressors. The aim of the present study was to modify an existing laboratory stressor to serve as a potent stressor in children and to allow for direct comparison between children's and adults' stress responses. Thirty children, ages 9-12 (14 female), and 31 young adults, ages 18-25 (17 female), were exposed to the modified protocol (TSST-M). A significant increase in salivary cortisol was observed in response to the TSST-M, F(2.5,125.4)=19.65, p<.001, eta(2)=.28, and overall, no differences were found between children's and adults' responses, F(2.5,125.4)=.31, n.s. Children and adults also showed similar changes in negative and positive affect, both F<1.18, n.s. and reported a similar amount of distress during the TSST-M, F(1,57)=.97, n.s. Children did, however, exhibit a significantly greater number of behaviors indicative of distress, F(1,50)=6.59, p=.01, eta(2)=.12. This study provides preliminary evidence that the TSST-M is a useful laboratory procedure to induce significant cortisol responses in children. It also suggests comparable responses in cortisol and self-reported affect in young adults and children.
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