The risks associated with negative peer relationships and low socioeconomic status (SES), and how they impact diurnal cortisol and the cortisol response to negative experiences, have never been studied together in early adolescents; this study aims to fill this gap in the literature. Saliva was collected from 95 early adolescents (M_age = 10.80, SD = 0.72) and daily diaries were completed 30 min after awakening, beginning of school, 15 min after first recess, 15 min after lunch, and at the end of the school day across four consecutive days. Hierarchical Linear Modelling was used to estimate the within- and between-person variances of diurnal cortisol and the cortisol response to stress in the context of SES and peer experiences. Cortisol secretion differed by gender and was predicted by SES and social status within the peer group. Low-SES early adolescents had higher morning cortisol. Girls who were from higher SES families had the steepest diurnal cortisol slope. Non-accepted early adolescents had low cortisol in response to both positive and negative social experiences. The findings from this study clarify the impact of both SES and peer relations on early adolescent psychophysiological development.

同伴关系消极和社会经济地位低下（SES）相关的风险，以及它们如何影响昼夜皮质醇和皮质醇对不良经历的反应，从未在青少年早期进行过研究。本研究旨在填补文献中的空白。从95名早期青少年（M_年龄）收集唾液。 = 10.80，SD = 0.72），每天的日记都在唤醒后30分钟，开学后，第一次休息后15分钟，午餐后15分钟以及连续四天的结束时间完成。在SES和同伴经历的背景下，使用层次线性模型来估计人际和人际日间皮质醇的变化以及皮质醇对压力的反应。皮质醇的分泌因性别而异，并且是由同伴群体中的SES和社会地位预测的。低SES的青少年早期皮质醇水平较高。来自较高SES家庭的女孩的每日皮质醇斜率最大。未接受的早期青少年对积极和消极的社会经历都有较低的皮质醇水平。