Strength - research can offer advice to parents
parents and prospective parents sometimes agonise over decisions like who should take on primary caregiver role. mothers may feel pressured to stay at home as of stereotypical views of mothers and fathers roles
fathers may also be pressured to focus on work rather than parenting.
research into role of fathers offers reassuring advice to parents.
e.g. heterosexual parents can be informed fathers are capable of becoming primary attachment figures
also lesbian and single-mother families can be informed not having a father doesn't affect a child's development