The cortisol reactivity threshold model: Direction of trait rumination and cortisol reactivity association varies with stressor severity
| Autor: | Bradley M. Avery, Vaibhav R. Sapuram, Maria Ditcheva, Suzanne Vrshek-Schallhorn |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Adult
Male Hypothalamo-Hypophyseal System endocrine system Hydrocortisone Endocrinology Diabetes and Metabolism Pituitary-Adrenal System Developmental psychology 03 medical and health sciences 0302 clinical medicine Endocrinology medicine Trier social stress test Humans Risk factor Saliva Reactivity (psychology) Biological Psychiatry Depressive Disorder Depression Endocrine and Autonomic Systems Stressor Biobehavioral Sciences 030227 psychiatry Psychiatry and Mental health Rumination Cognitive Rumination Trait Female medicine.symptom Threshold model Psychology Stress Psychological 030217 neurology & neurosurgery medicine.drug Clinical psychology |
| Zdroj: | Psychoneuroendocrinology. 92:113-122 |
| ISSN: | 0306-4530 |
| DOI: | 10.1016/j.psyneuen.2017.11.002 |
| Popis: | Various internalizing risk factors predict, in separate studies, both augmented and reduced cortisol responding to lab-induced stress. Stressor severity appears key: We tested whether heightened trait-like internalizing risk (here, trait rumination) predicts heightened cortisol reactivity under modest objective stress, but conversely predicts reduced reactivity under more robust objective stress. Thus, we hypothesized that trait rumination would interact with a curvilinear (quadratic) function of stress severity to predict cortisol reactivity. Evidence comes from 85 currently non-depressed emerging adults who completed either a non-stressful control protocol (n = 29), an intermediate difficulty Trier Social Stress Test (TSST; n = 26), or a robustly stressful negative evaluative TSST (n = 30). Latent growth curve models evaluated relationships between trait rumination and linear and quadratic effects of stressor severity on the change in cortisol and negative affect over time. Among other findings, a significant Trait Rumination x Quadratic Stress Severity interaction effect for cortisol's Quadratic Trend of Time (i.e., reactivity, B = .125, p = .017) supported the hypothesis. Rumination predicted greater cortisol reactivity to intermediate stress (rp = .400, p = .043), but blunted reactivity to more robust negative evaluative stress (rp = -0.379, p = 0.039). Contrasting hypotheses, negative affective reactivity increased independently of rumination as stressor severity increased (B = .453, p = 0.044). The direction of the relationship between an internalizing risk factor (trait rumination) and cortisol reactivity varies as a function of stressor severity. We propose the Cortisol Reactivity Threshold Model, which may help reconcile several divergent reactivity literatures and has implications for internalizing psychopathology, particularly depression. |
| Databáze: | OpenAIRE |
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