The interplay of attachment styles and marital infidelity: A systematic review and meta-analysis

Marital infidelity is a highly distressing experience for those involved. Understanding the psychological factors related to infidelity can help develop targeted interventions. The primary aim of this study was to assess the association between attachment styles and marital infidelity.

Seventeen studies were included, sourced from electronic databases including PubMed, Scopus, Web of Science, and PsycInfo, with no time limitations, up to April 2023. The search employed terms like "attachment AND marital infidelity." Study quality was evaluated using the Risk of Bias Assessment Tool from RevMan version 5.3.

The meta-analysis involved a total of 13,666 participants, ranging from 208 to 4047 individuals. Findings showed that higher levels of anxiety and avoidance in attachment were significantly associated with increased marital infidelity (r = 0.18, 95 % CI = 0.14-0.22, p < 0.0001). Conversely, weaker attachment insecurity was linked to reduced rates of marital infidelity. Additionally, both dismissive and fearful attachment styles correlated with marital infidelity, with respective weighted effect sizes of r = 0.07, p < 0.001 (95 % CI = 0.04-0.10) and r = 0.19, p < 0.001 (95 % CI = 0.10-0.29). No association was found between preoccupied attachment and infidelity.

Individuals with insecure attachment styles, specifically those with high levels of anxiety or avoidance, are more likely to engage in marital infidelity. Attachment styles should be a focus in couples therapy, especially for treatment related to infidelity. Assessing and addressing these underlying attachment issues can better guide therapists in their work with couples facing infidelity.