Scholars have extensively used the job demands–resources model to explain the dynamics underlying work engagement and proposed several versions of the model. However, in theoretical terms, nonwork elements have not been incorporated into the model. This study investigated the roles of home demands and resources in the model by testing the boost/buffer hypotheses for work engagement from the perspective of the work–home interface. We demonstrated that (1) the demands of a domain boost the positive impact of resources drawn from another domain on work engagement, (2) the resources of a domain buffer the negative impact of demands derived from another domain on work engagement; and (3) the buffering and boosting effects of home demands and resources impact work engagement. We conducted a diary study on a group of coffee shop employees in Ireland. The results partially supported the proposed hypotheses but nevertheless indicated support for the cross-domain boost/buffer hypotheses with regard to work engagement. The proposed model may serve as a theoretical foundation for research on issues related to the impact of work and nonwork domains on work engagement.

中文翻译：

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扩展工作需求-资源模型，以了解家庭和工作领域之间的相互作用对工作投入的影响

学者们广泛使用工作需求-资源模型来解释工作投入的动态，并提出了该模型的多个版本。然而，从理论上讲，非工作元素尚未纳入模型中。本研究通过从工作与家庭界面的角度测试工作投入的增强/缓冲假设，调查了模型中家庭需求和资源的作用。我们证明了（1）一个领域的需求增强了来自另一个领域的资源对工作投入的积极影响，（2）一个领域的资源缓冲了来自另一个领域的需求对工作投入的负面影响；(3)家庭需求和资源的缓冲和促进作用影响工作投入。我们对爱尔兰的一组咖啡店员工进行了日记研究。结果部分支持了所提出的假设，但仍然表明支持有关工作投入的跨领域增强/缓冲假设。所提出的模型可以作为研究工作和非工作领域对工作投入的影响相关问题的理论基础。