This mixed methods study employed comparative, case-study methodology to explore influences affecting the development of musical interests and achievements in eight female and eight male young adults with Williams Syndrome. Components of the "Schoolwide Enrichment Model"; (Renzulli & Reis, 1997b) were used to guide the study. Caregivers completed telephone interviews and checklists from their homes and participants completed a range of interviews and questionnaires while attending a 10-day, music, talent development program. Results indicated influences, identified through the ecological model, constructivism and behaviourism that influenced the development of supportive, inclusive school communities that may have affected the development of the participants and their musical potential.