BackgroundA high incidence of Reactive Attachment Disorder (RAD) and Disinhibited Social Engagement Disorder (DSED) has been reported for children with experiences of trauma and other forms of adversity. ObjectiveThe present study aims to explore symptoms of RAD and DSED in children in two protection alternatives (international adoption and residential care) after experiences of early adversity. Participants and settingThe participants were 146 children: 40 children adopted into Spanish families from Russia, 49 children in residential care in Spanish institutions (40.8% in long-term foster centers) and 57 community comparison children. MethodsThe Relationship Problems Questionnaire was used to explore both RAD and DSED. All adoptive parents and institutional caregivers retrospectively reported the problems at time of placement (Wave 0), as well as the symptoms observed at the time of the study, with children aged 4–8 years old (Wave 1). At this stage, the assessment of the community comparison group was added. ResultsAdopted and children in residential care presented high levels of RAD and DSED symptoms at placement. For adoptees, previous experiences of abuse and neglect were marginally associated with the initial presence of RAD symptoms and a significant recovery was observed after an average of three years in their families, with a certain level of longitudinal continuity between initial and later assessments. In children currently placed in long-term residential centers in Spain, DSED symptoms worsened from W0 to W1. ConclusionsAdoption appears to be an effective intervention that promotes recovery of RAD and DSED symptomatology after early adversity, whereas institutionalization causes negative effects.