Out-of-home placed children or adolescents can be placed in family-style group care, a promising alternative youth care setting. It provides children and Professional Foster Parents (PFPs) with the opportunity to create a continuous relationship. This relationship, in turn, is an important factor in building and maintaining attachment. Scientific literature shows that sensitivity and responsivity are crucial interactional elements for building and maintaining an attachment relationship, but little knowledge is available on how those concepts are displayed in mundane interactions.