References
- Hahs-Vaughn , DL and Nye , C . 2008 . Understanding high quality research designs for speech language pathology . Evidence-based Communication Assessment and Intervention , 2 : 218 – 224 .
- Yoder , PJ and Compton , D . 2004 . Identifying predictors of treatment response . Mental Retardation and Developmental Disabilities Research Reviews , 10 : 162 – 168 .