Abstract
BACKGROUND: Attachment styles may exert an influence on emotional regulation, specifically, secure attachment has been associated with more adaptative emotion regulation strategies and enhanced adult well-being. Despite the recognized importance of secure attachment in promoting mental health and well-being, little is known about how attachment styles manifest and evolve in adults with autism spectrum disorder (ASD). This systematic review examines "What is the connection between attachment styles and psychological, relational, and clinical variables in individuals with ASD or autistic traits, according to scientific research?". METHODS: A literature search, adhering to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, was performed across PubMed, Web of Science and ProQuest Central databases. Using HubMeta, 12 studies were selected based on set criteria. Two independent reviewers conducted the entire process, from searching and selecting studies to extracting data and assessing quality. Inter-rater agreement was high, with kappa values ranging from 0.94 to 1. RESULTS: The sample included 91,078 (98.99%) women and 346 (0.38%) men. Studies assessed attachment, ASD or autistic traits (Broader Autism Phenotype, BAP), intelligence quotient (IQ), depression, anxiety, stress, marital and relationship satisfaction, emotional availability and intelligence, empathy, ASD difficulties, personality traits and motivational processes, and gaming disorder. Individuals with ASD show higher rates of insecure attachment than general population and this could have an impact on their mental health and well-being. Parents with ASD also show difficulties when establishing the bond with their children. CONCLUSION: This review highlights the importance of developing interventions with adults with ASD with the aim to establish better bonding and reaching greater well-being and mental health. The PROSPERO Registration: CRD42024628086, (https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42024628086).