Complex sentence: The training is usually delivered by therapists (psychologists or social workers) to individual families or groups of families, and is conducted primarily with the parents rather than the child, although children can become involved as the therapist and parents see fit.
Split into simpler sentences: The training is usually delivered by therapists (psychologists or social workers) to individual families or groups of families. PMT is conducted primarily with the parents rather than the child, although children can become involved as the therapist and parents see fit.