Age differences can have an important effect on sibling relationships. In general, siblings that are closer in age have more interaction and are more intimate. In addition, there is usually a greater feeling of closeness among same-sex siblings of close ages. Older siblings tend to have more power than younger siblings, and the latter often feel that they are the subject of dominance. However, older siblings also tend to nurture and watch out for younger siblings. This is especially the case among siblings that are far apart in age. Finally, antagonism and competition are usually greater among siblings that are close in age, and there is often more fighting and rivalry as well.
The number of siblings in a family is also significant. Older siblings generally are more nurturing in families of more than four siblings than in those with two or three. In fact, in large families, older siblings tend to play the role of caretaker as opposed to peer or companion.
Two siblings, close friends.
The Duggar Family is a family consisting of seventeen children: ten sons and seven daughters.