Judges evaluate the parents’ abilities to place the child’s needs first and to encourage the child’s relationship with the other parent. They consider the child’s relationships, adjustment to home and school, and each parent’s past involvement pattern. The court weighs the ability to cooperate on major decisions when allocating decision-making responsibility. Credible evidence of safety concerns or endangerment is paramount. The child’s wishes may be considered when appropriate. These factors are codified in the best-interests statute.