The physicаl therаpist is evаluating an 8-mоnth-оld cоrrected age infant with a history of prematurity (born at 30 weeks gestation). The physical therapist notes gross motor delay based on HINE stadardized test results and asymmetrical movements. In addition to giving the parents a program to encourage developmentally appropriate motor movements, which of the following is the physical therapist’s next course of action?