Anyone who takes on the role of the main male caregiver, not necessarily the biological father
Primary caregiver
The person who spends most time with a baby, caring for its needs
Primary attachment figure
The person to whom the baby has the strongest attachment
The primary caregiver and primary attachment figure are often the same person but not always
Lifestyle choice
Jacob and Kalwant deciding whether Jacob should be the primary caregiver
Attachment to a father
May be more about play than 'nurturing' (emotional care) but this makes an important contribution to development
Most attachment research has focused on mother and baby attachment, and the role of the father in the development of attachment has often been neglected
Fathers are much less likely to become babies' first attachment figure compared to mothers
However, most fathers go on to become important attachment figures, with 75% of babies studied forming an attachment with their father by 18 months
Attachment to fathers is less important than attachment to mothers for later adolescent attachments
But the quality of fathers' play with babies was related to the quality of adolescent attachments, suggesting fathers have a different role focused more on play and stimulation
When fathers do take on the role of primary caregiver, they are able to adopt the emotional role more typically associated with mothers
The research on the role of the father is based on the assumption that babies have two opposite-gender parents, which is not always the case
There is no suggestion from respectable psychologists that having a single parent or two same-gender parents has any negative impact on children's development
Limitations of research on the role of the father
Lack of clarity over the specific research question being asked
Conflicting evidence from different methodologies
Studies consistently show that children in single-mother and lesbian-parent families do not develop differently from children in two-parent heterosexual families
The question of a distinctive role for fathers remains unanswered, as families can adapt to not having a father present
Research into the role of the father can be used to offer reassuring advice to parents, such as that fathers are capable of becoming primary attachment figures
Parental anxiety about the role of fathers can be reduced by this research
Preconceptions about how fathers do or should behave may cause unintentional observer bias in this research
Observational research
Observing mothers and fathers with their babies at a soft-play centre
Jasper, the father of a 9-month-old girl Emily, is upset that Emily only accepts comfort from her mother when distressed
Research into the role of the father in attachment can advise Jasper about his important role in Emily's developing attachments