Frequently a psychological evaluation and more in depth study is conducted.
The psychological evaluator then submits each of the parents and perhaps the child or children to a battery of psychological tests as well as clinical observations.
The determination is made first as to whether either parent suffers from any psychological dysfunction.
Then, the psychologist will look into the history of the child’s life and the parenting plan that has existed over time, again, giving heavy weight to the most recent effective parenting plan.
The evaluator, still desiring to shake or rattle the child’s life as little as possible attempts to project the existent circumstances into the future making minor alterations or suggestions.
On the other hand, if there truly is good reason and a substantial basis for dramatic change, many psychologists will so recommend.