Influences on parent perceptions regarding the practice of integrating students with significant cognitive disabilities into general education classrooms were examined. Findings confirmed that perceptions were significantly influenced by characteristics of the parent and the child as well as by factors associated with the child's placement history. Further, factors influencing these perceptions differed according to varying dimensions of inclusion being considered. We argue that the efficacy of any specific type of educational model cannot be determined without a consideration of the complex dynamics involved in the interplay between individual child characteristics, parent and family values, and the perceived role of the school.