Father-infant and mother-infant (one-year-olds) adrenocortical attunement was explored during the Strange Situation Procedure (SSP) among 125 father-infant and 141 mother-infant dyads. Cortisol was assessed at baseline (T1), 20 (T2), and 40 minutes (T3) after the first parent-infant separation. Initial correlations indicated significant associations between father-infant and mother-infant cortisol at each time. Cortisol interdependence was further explored using Actor-Partner Interdependence Models. There was no evidence supporting cortisol interdependence based on within-time residual correlations between parent-infant cortisol, once stability and cross-lagged paths were controlled. Infant cortisol at T2 predicted T3 cortisol for fathers and mothers resulting in a series of follow-up exploratory analyses to examine mediating processes which revealed that infant distress during the SSP predicted infant T2 cortisol, which, in turn, predicted infant negativity during the 15-min mother-infant teaching task that followed the SSP. Among father-infant dyads, infant T2 cortisol predicted infant negativity during father-infant interaction, with infants expressing more negativity having less sensitive fathers. Findings provide little support of parent-infant adrenocortical attunement across either father-infant or mother-infant dyads during the SSP, but preliminary evidence indicates infant distress as a potential mediator. Future research may want to focus on affective and behavioral processes that underlie the concept of parent-infant adrenocortical attunement.

中文翻译：

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父婴和母婴二元组中的肾上腺皮质相互依赖：协调还是其他？

在 125 名父婴和 141 名母婴二元组的奇异情境程序 (SSP) 中探索了父婴和母婴（一岁儿童）肾上腺皮质协调。在第一次亲子分离后的基线 (T1)、20 (T2) 和 40 分钟 (T3) 评估皮质醇。最初的相关性表明每次父婴和母婴皮质醇之间存在显着关联。使用演员-合作伙伴相互依赖模型进一步探索皮质醇相互依赖。一旦稳定性和交叉滞后路径得到控制，没有证据支持基于亲子皮质醇之间的时间内残余相关性的皮质醇相互依赖。T2 的婴儿皮质醇预测了父亲和母亲的 T3 皮质醇，从而导致一系列后续探索性分析检查中介过程，这些过程揭示了 SSP 期间的婴儿窘迫预测婴儿 T2 皮质醇，这反过来又预测了婴儿在 15- SSP 之后的最小母婴教学任务。在父婴二元组中，婴儿 T2 皮质醇预测了父婴互动期间婴儿的消极情绪，婴儿表达更多的消极情绪，而父亲则不太敏感。研究结果几乎不支持 SSP 期间父婴或母婴二元组的父母-婴儿肾上腺皮质协调，但初步证据表明婴儿窘迫是潜在的中介。