 Unique properties Generally, research has found that, compared to mothers, fathers tend to fill more of a “ play-mate ” role for their children, rather than a “caregiver” role.
<fluency>  Unique properties Generally, research has found that, compared to mothers, fathers tend to fill more of a “ play-mate ” role for their children, rather than a “caregiver” role.
 Unique properties Generally, research has found that, compared to mothers, fathers tend to fill more of a “ play-mate " role for their children, rather than a “caregiver” role.