American Psychiatric Association (1980) Diagnostic and Statistical Manual of Mental Disorders (3rd edn) (DSM–III). Washington, DC: APA.
American Psychiatric Association (1987) Diagnostic and Statistical Manual of Mental Disorders (3rd edn revised) (DSM–III–R). Washington, DC: APA.
American Psychiatric Association (1994) Diagnostic and Statistical Manual of Mental Disorders (4th edn) (DSM–IV). Washington. DC: APA.
Burd, L., Fisher, W. & Kerbeshian, J. (1989) Pervasive disintegrative disorder: are Rett syndrome and Heller dementia infantilis subtypes? Developmental Medicine and Child Neurology, 31, 609–616.
Corbett, J., Harris, R., Taylor, E., et al (1977) Progressive disintegrative psychosis of childhood. Journal of Child Psychology and Psychiatry, 18, 211–219.
Creak, E. M. (1963) Childhood psychoses: a review of 100 cases. British Journal of Psychiatry, 109, 84–89.
Doll, E. A. (1965) The Vineland Social Maturity Scale: Condensed Manual of Directions (revised edn). Minneapolis. MN: American Guidance Service Inc.
Gillberg, C. & Steffenburg, S. (1987) Outcome and prognostic factors in infantile autism and similar conditions: a population study of 46 cases followed through puberty. Journal of Autism and Developmental Disorders, 17, 273–287.
Gillberg, I. C., Gillberg, C. & Ahlsen, G. (1994) Autistic behaviour and attention deficits in tuberous sclerosis. A population based study. Developmental Medicine and Child Neurology, 36, 50–56.
Heller, T. (1908) Dementia infantilis. Zeitschriff für die Erforschung und Behandlung des Jugendlichen Schwachsinns, 2, 141–165.
Hill, A. E. & Rosenbloom, L. (1986) Disintegrative psychosis of childhood: teenage follow-up. Developmental Medicine and Child Neurology, 28, 34–40.
Kendell, R. E. (1989) Clinical validity Psychological Medicine, 19, 45–55.
Kurita, H. (1988) The concept and nosology of Heller's syndrome: review of articles and report of two cases. Japanese Journal of Psychiatry and Neurology, 42, 785–793.
Kurita, H., Kita, M. & Miyake, Y. (1992) A comparative study of development and symptoms among disintegrative psychosis and infantile autism with and without speech loss. Journal of Autism and Developmental Disorders, 22, 175–188.
Leiter, R. G. (1969) Examiner's manual for the Leiter international performance scale. Chicago, IL: Stoelting.
Malhotra, S. & Singh, S. P. (1993) Disintegrative psychosis of childhood. An appraisal and case study. Acta Paedopsychiatrica, 56, 37–40.
Mouridsen, S. E., Rich, B. & Isager, T. (1993) Parental age in infantile autism, autistic-like conditions, and borderline childhood psychosis. Journal of Autism and Developmental Disorders, 23, 387–396.
Mouridsen, S. E., Rich, B. & Isager, T. (1998) The validity of childhood disintegrative psychosis: a long term follow-up study. Developmental Medicine and Child Neurology, in press.
Norusis, M. J. (1993) SPSS for Windows. Advanced Statistics. Release 6.0. Chicago, IL: SPSS Inc.
Rivinus, T. M., Jamison, D. L. & Graham, P. J. (1975) Childhood organic neurological disease presenting as psychiatric disorder. Archives of Disease in Childhood, 50, 115–119.
Siegel, J. (1994) Statistix. Version 4.1 User's Manual. Talahassee, FL: Analytical Software.
Volkmar, F. R. (1992) Childhood disintegrative disorder: issues for DSM–IV. Journal of Autism and Developmental Disorders, 22, 625–642.
Volkmar, F. R. & Cohen, D. J. (1989) Disintegrative disorder or ‘late onset’ autism. Journal of Child Psychology and Psychiatry, 130, 717–724.
Volkmar, F. R. & Rutter, M. (1995) Childhood disintegrative disorder: results of the DSM-IV autism field study. Journal of the American Academy of Child and Adolescent Psychiatry, 34, 1092–1095.
Wechsler, D. (1958) The Measurement and Appraisal of Adult Intelligence (4th edn). Baltimore, MD: Williams and Wilkins.
Wing, L. (1983) Social interpersonal needs. In: Autism in Adolescents and Adults (eds Schopler, E. & Mesibov, G. M.) pp. 337–354. New York: Plenum Press.
World Health Organization (1978) International Classification of Diseases. Mental Disorders: Glossary and Guide to their Classification (9th rev). Geneva: WHO.
World Health Organization (1992) ICD-10: The ICD-10 Classification of Mental and Behavioural Disorders – Clinical Descriptions and Diagnostic Guidelines. Geneva: WHO.