Alexithymia refers to difficulties identifying and describing one's emotions. Growing evidence suggests that alexithymia is a key transdiagnostic risk factor. Despite its clinical importance, the etiology of alexithymia is largely unknown. The present study employs meta-analytic methods to summarize findings on the role of one hypothesized antecedent of adult alexithymia, namely child maltreatment. We obtained effect size estimates from 99 independent samples reported in 78 unique sources that reported both child maltreatment history and adult levels of alexithymia. These studies involved a total of 36,141 participants. Using correlation coefficients as our effect size index, we found that child maltreatment was positively related to overall adult alexithymia (r = .23 [.19, .27]). Notably, emotional abuse (r = .18 [.13, .23]), emotional neglect (r = .21 [.16, .26]), and physical neglect (r = .18 [.15, .22]) were the strongest predictors. Effects were moderated by gender, affiliation with clinical versus nonclinical samples, and publication status. Overall results were robust to publication bias and the presence of outliers. These findings contribute to a more nuanced understanding of the complex connection between different types of child maltreatment and alexithymia, providing greater insight into the early environmental influences on alexithymia. Public Significance StatementThis meta-analysis reveals that adult alexithymia, which is defined by difficulties identifying and describing one's emotions, is linked to child maltreatment. These effects are strongest when individuals experience emotional abuse, emotional neglect, or physical neglect as children.

Daycare maltreatment refers to abusive and/or neglectful acts perpetrated by teachers, directors, non-professionals or volunteers, family members of staff, and peers in a daycare setting. Despite growing evidence of its occurrence, the prevalence and consequences of daycare maltreatment for the child, the parent(s), and their dyad are largely unknown. This qualitative systematic literature review was conducted to synthesize the existing literature referring to daycare maltreatment, using Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. In order to be included in the analysis, the manuscripts needed to report empirical findings regarding maltreatment in daycare settings, be written in English, be published in a peer-reviewed journal or a dissertation, and be accessible by our research team. In all, 25 manuscripts met the above criteria and were included in the review. Our results indicate that reports of daycare maltreatment are characterized by early age of abused children, inferring mainly to sexual, physical, and emotional abuse. The majority of these manuscripts reported caregivers’ and teachers’ abuse, while peer victimization was reported much less. In addition, the findings demonstrated a higher representation of female perpetrators compared to abuse in other scenarios. Although some indications of long-term implications are reported in the manuscripts, a well-validated measure for assessment of daycare maltreatment seems to be lacking. These findings contribute to a more nuanced understanding of the complex experience and ramifications of daycare maltreatment, providing insight into its multi-faceted implications.

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