Research has suggested highly elevated levels of interpersonal trauma (IPT) among parents with intellectual disabilities (ID), and that such experiences may contribute to the caregiving and child developmental problems often seen in this population. Conflicting results have however been reported, and there is no systematic review on this matter. This study therefore systematically reviewed the empirical evidence concerning (a) prevalence of IPT among parents with ID, and links with (b) caregiving-relevant and (c) child developmental outcomes, in accordance with the PRISMA 2020 guidelines. Searches were conducted in MEDLINE, CINAHL, PsycINFO, and PTSDpubs. Peer-reviewed empirical articles reporting exposure to any form of systematically assessed IPT (unspecified IPT, physical, sexual, and emotional abuse, neglect, prolonged childhood separations from caregivers, witnessing abuse in the family) among parents with ID were included, yielding a final selection of 20 studies. Findings consistently indicated markedly elevated levels of IPT among parents with ID, with a majority (>50%) having experienced some form of IPT. Estimates for both unspecified and specific forms were typically higher than corresponding estimates in other groups at elevated risk, and than meta-analytical general population estimates in comparable countries. Findings regarding caregiving-relevant outcomes were mixed but indicated links with adverse outcomes, particularly regarding parental mental health. Reports pertaining to child developmental outcomes were scant and inconsistent. We highlight important limitations in the extant literature and provide directions for future research and clinical practice. 

Background: Parental mentalising difficulties are robustly linked to caregiving problems. Mothers with intellectual disability are at risk for caregiving problems, but knowledge on their parental mentalising abilities is lacking. The present study aimed to fill this gap.

Method: Thirty mothers with mild intellectual disability, and 61 comparison mothers with ADHD, were assessed for parental mentalising using the Parental Reflective Functioning Questionnaire. Contributions of intellectual disability, maternal exposure to childhood abuse/neglect and psychosocial risk to parental mentalising were examined through hierarchical regression analysis.

Results: Mothers with intellectual disability had a heightened risk for parental mentalising difficulties, in the form of elevated prementalising. Intellectual disability and cumulative childhood abuse/neglect uniquely predicted prementalising among the mothers, whereas cumulative psychosocial risk added to the risk for prementalising specifically among mothers with intellectual disability.

Conclusions: Our findings support contextual models of caregiving, and suggest a need for mentalisation-based support for parents with mild intellectual disability.

Prior research indicates links between parents' experiences of interpersonal trauma and emotion-interpretation difficulties, and between such difficulties and child attachment insecurity and disorganization. Although mothers with mild levels of intellectual disability (ID) are at heightened risk for trauma and emotion-interpretation difficulties, and their children for attachment insecurity, corresponding links in this population have not been examined. We therefore investigated emotional interpretations among mothers with mild levels of ID (n = 23) and matched comparison mothers without ID (n = 25), in relation to mothers' experiences of trauma and their children's attachment representations. Mothers with mild levels of ID were not less accurate than comparison mothers with regard to general positive and negative emotion-interpretation accuracy, but they were significantly more likely to misinterpret shame and anger. Among mothers with mild levels of ID, misinterpretations of shame were positively related to maternal experiences of trauma, and to child attachment insecurity and disorganization.