Attachment theory (Bowlby, 1969) is one of the most influential theories regarding the impact of family relationships on lifelong relational and individual well-being. Through the lens of attachment theory, patterns of interactions with parents (and other important figures) can shape working models of the self and others which persist into adulthood. When parents are absent or unreliable, children may develop anxious attachment patterns (where they may be overly afraid of rejection, abandonment, and withdrawal), and/or avoidant attachment patterns (where they may withdraw, avoid intimacy, and distrust others). On the other hand, children who have reliable, supportive parents should develop a “secure” attachment and feel more comfortable and confident in exploring the world around them. Attachment theory suggests that both attachment anxiety and attachment avoidance can be detrimental to psychological well-being. This hypothesis been supported by a large body of empirical research in children, adolescents, and adults suggesting a strong link between attachment and mental health (e.g., Madigan et al., 2016; Spruit et al., 2020; Zheng et al., 2020).
Although attachment theory has motivated research and shaped practice for decades, the vast majority of empirical work has focused on the role of mothers to the exclusion of other caretakers. Most notably, research on attachment to fathers remains highly limited (Bretherton, 2010; Brumariu & Kerns, 2010). This has led to limited understanding of how, if at all, attachment relationships with fathers differ from those with mothers, and what the combined impact of these relationships is on development. These criticisms are not new (e.g., Cowan, 1997; Rutter, 1979), but recent increases in research on attachment to fathers may signal that the tides are changing (Ahnert & Schoppe-Sullivan, 2020). What might we expect to learn from this work as it develops?

