The examiner should be able to document having accomplished a significant number of custody decisions that reflect an unbiased record (e.g., the evaluator does not always recommend that the mother get the children).
If the psychologist has a particular choice in mind as to who should receive custody, he or she may examine the psychological test data searching for evidence to confirm if as opposed to looking at evidence that might disconfirm it.
The bottom line is that the psychologist who does not provide a thoroughly convincing and compelling argument for the interpretation of his or her interview, test data, and observations to provide a custody determination is not doing the family or the court a useful service.
Ira Daniel Turkat, PhD., is the chief psychologist at Venice Hospital and is on the clinical faculty of the University of Florida College of Medicine. He maintains a private practice in Venice, Florida.