Descriptions of shape [edit]. The shape of a distribution will fall somewhere in a continuum where a flat distribution might be considered central and where types of departure from this include: mounded (or unimodal), U-shaped, J-shaped, reverse-J shaped and multi-modal. A bimodal distribution would have two high points rather than one.
18 is the age. If something dangerous is going on, then you can petition the court on the matter. Courts will listen to children. But if nothing harmful is going on and your daughter just doesn't want to see her father, the court is not likely to stop the visitations.
However, the attoney told me that for children who are  12 and older, if they refuse to go to a visit, or refuse to see the  parent when they came to pick them up, the custodial Parent is not  breaking any law as long as the child was made available for the  visit.