The case is presented of a 17-year-old boy with a recent diagnosis of Asperger's syndrome. Despite displaying a characteristic pattern of deficits in cognitive, social and behavioural functioning, isolated cognitive skills and a remarkable ability for calendar calculation, this boy was not diagnosed during childhood. Coexisting skills and impairments were explored through a description of developmental history and current functioning. The article considers the reasons for the disorder not being identified during childhood and discusses the case-study findings in relation to current issues about the prevalence of Asperger's syndrome, the difficulties of diagnosis and essential diagnostic criteria.
Achenbach, T.M.
, & Edelbrock, C. (1983). Manual for the Child Behavior Checklist and Revised Child Behavior Profile. Burlington: University of Vermont.
2.
American Psychiatric Association
. (1987). Diagnostic and statistical manual of mental disorders (3rd ed., rev.). Washington, DC: Authors.
3.
American Psychiatric Association
. (1994). Diagnostic and statistical manual of mental disorders (4th ed.). Washington, DC: Authors.
4.
Asperger, H.
(1991). `Autistic psychopathy' in childhood. In U. Frith (Ed.), Autism and Asperger syndrome (pp. 37-92). Cambridge: Cambridge University Press.
5.
Baron-Cohen, S.
(1988). An assessment of violence in a young man with Asperger's syndrome. Journal of Child Psychology and Psychiatry, 28(3), 351-360.
6.
Carruthers, A.
, & Foreman, P.J. (1989). Asperger syndrome: An educational case study of a preschool boy. Australia and New Zealand Journal of Developmental Disabilities, 15(1), 57-65.
7.
Cattell, R.B.
, Eber, H.W., & Tatsuoka, M.M. (1970). Handbook for the 16PF. Champaign, IL: IPAT.
8.
Cooper, S.A.
, Mohamed, W.N., & Collacott, R.A. (1993). Possible Asperger's syndrome in a mentally handicapped transvestite offender. Journal of Intellectual Disability Research, 37, 189-194.
Dewey, M.
(1991). Living with Asperger's syndrome. In U. Frith (Ed.), Autism and Asperger syndrome (pp. 184-206). Cambridge: Cambridge University Press.
11.
Frith, U.
(1991). Asperger and his syndrome. In U. Frith (Ed.), Autism and Asperger syndrome (pp. 1-36). Cambridge: Cambridge University Press.
12.
Gillberg, C.
(1985). Asperger's syndrome and recurrent psychosis - A case study. Journal of Autism and Developmental Disorders, 15(4), 389-397.
13.
Gillberg, C.
(1989). Asperger syndrome in 23 Swedish children: A clinical study. Developmental Medicine and Child Neurology, 31, 520-531.
14.
Gillberg, I.C.
, & Gillberg, C. (1989). Asperger syndrome: Some epidemiological considerations: A research note. Journal of Child Psychology and Psychiatry, 30(4), 631-638.
15.
Green, J.
(1990) Is Asperger's a syndrome? Developmental Medicine and Child Neurology, 32, 743-746.
16.
Hill, L.
(1975). An investigation of calendar calculating by an idiot savant. American Journal of Psychiatry, 132(5), 557-561.
17.
Horwitz, WA.
, Kestenbaum, C., Person, E., & Jarvik, L. (1965). Identical twin - `idiot savants' - calendar calculators. American Journal of Psychiatry, 121, 1075-1079.
18.
Howe, M.J.A.
, & Smith, J. (1988). Calendar calculating in `idiot savants': How do they do it? British Journal of Psychology, 79, 371-386.
19.
Rosen, A.M.
(1981). Adult calendar calculators in a psychiatric OPD: A report of two cases and comparative analysis of abilities. Journal of Autism and Developmental Disorders, 11(3), 285-292.
20.
Rubin, E.J.
, & Monaghan, S. (1965). Calendar calculation in a multiple-handicapped blind person. American Journal of Mental Deficiency, 70, 478-485.
21.
Steele, J.G.
, Gorman, R., & Flexman, J.E. (1984). Neuropsychiatric testing in an autistic mathematical idiot savant: Evidence for nonverbal abstract capacity. Journal of Child Psychiatry, 23, 704-707.
22.
Stevens, D.E.
, & Moffitt, T.E. (1988). Neuropsychological profile of an Asperger's syndrome case with exceptional calculating ability. The Clinical Neuropsychologist, 2(3), 228-238.
23.
Szatmari, P.
(1991). Asperger's syndrome: Diagnosis, treatment, and outcome. Psychiatric Clinics of North America, 14(1), 81-93.
24.
Szatmari, P.
, Bartolucci, G., & Bremner, R. (1989). Asperger's syndrome and autism: Comparison of early history and outcome. Developmental Medicine and Child Neurology, 31, 709-720.
25.
Szatmari, P.
, Bartolucci, G., Finlayson, A., & Krames, L. (1986). A vote for Asperger's syndrome. Journal of Autism and Developmental Disorders, 16, 515-517.
26.
Szatmari, P.
, Bremner, R., & Nagy, J. (1989). Asperger's syndrome: A review of clinical features. Canadian Journal of Psychiatry, 34, 554-560.
27.
Wechsler, D.
(1974). Manual for the Wechsler Intelligence Scale for Children-Revised (WISC-R). San Antonio, TX: The Psychological Corporation.
28.
Wechsler, D.
(1981). Manual for the Wechsler Adult Intelligence Scale-Revised (WAIS-R). San Antonio, TX: The Psychological Corporation.
29.
Wechsler, D.
(1987). Manual for the Wechsler Memory Scale-Revised (WMS-R). San Antonio, TX: The Psychological Corporation.
30.
Wing, L.
(1981). Asperger's syndrome: A clinical account. Psychological Medicine, 11, 115-129.
31.
Wing, L.
(1986). Clarification on Asperger's syndrome [Letter to the editor]. Journal of Autism and Developmental Disorders, 16, 513-515.
32.
Wing, L.
(1992). Manifestations of social problems in high-functioning autistic people. In E. Schopler, & G.B. Mesibov (Eds.), High-functioning individuals with autism (pp. 129-142). New York: Plenum.
33.
World Health Organization
(1992). ICD-IO Classification of mental and behavioural disorders - Clinical description and diagnostic guidelines. Geneva: Authors.
