1. Sturmey, P. (2004). Cognitive therapy with people with intellectual disabilities: A selective review and critique. Clinical Psychology and Psychotherapy, 11, 222–32.
2. Smith, J. C. (1985). Relaxation Dynamics: A Cognitive-Behavioral approach to Relaxation. Champaign, IL: Research Press.
3. Scotti, J. R. , Evans, I. M. , Meyer, L. H. & Walker, P. (1991). A meta-analysis of intervention research with problem behavior: Treatment validity and standards of practice. American Journal on Mental Retardation, 96, 233–56.
4. Stephens, R. M. , Matson, J. L. , Westmoreland, T. & Kulpa, J. (1981). Modification of psychotic speech with mentally retarded patients. Journal of Mental Deficiency Research, 25, 187–97.
5. Singh, N. N., Osborne, J. G. & Huguenin, N. H. (1996). Applied behavioral interventions. In J. W. Jacobson & J. A. Mulick (eds.), Manual of Diagnosis and Professional Practice in Mental Retardation (pp. 341–53). Washington, DC: American Psychological Association.