A one-group pretest-posttest design was used to measure developmental outcomes in 15 preschoolers receiving Therapeutic Listening in addition to their typical therapy services. Six assessments measuring fine-motor, visual-motor, social, language, and sensory processing were used. Statistically significant improvements were found in all areas except sensory processing and the behavior subtest of the Social Skills Rating System. Proportional Change Index scores indicated an accelerated rate of development in fine-motor, visual-motor, nonverbal ability, and language. Observations from parents, teachers, and therapists were consistent with these results. Findings suggest that the use of Therapeutic Listening in addition to typical therapy services may have a role in supporting the development for children with developmental disabilities. © Taylor & Francis Group, LLC.