Journal of Autism and Developmental Disorders

, Volume 37, Issue 4, pp 775–779 | Cite as

Brief Report: Error Pattern in an Autistic Savant Calendar Calculator

  • Alessandro Iavarone
  • Maria Patruno
  • Filomena Galeone
  • Sergio Chieffi
  • Sergio CarlomagnoEmail author
Brief Communication


Special ability in computing the day of the week from given dates was observed in a 18 years old male, L.E., suffering from autism. Neuropsychological testing revealed severe deficits in all cognitive domains and poor explicit knowledge of calendar structure. The subject scored well above the chance level on dates of the past and future decades. Error rate and response latency increased with temporal remoteness of dates. Most of errors were in indicating the weekday before or after that of date stimulus. The performance and error pattern suggest that L.E. used “encapsulated” computation algorithm(s) for the day of week task.


Savant syndrome Calendar calculator Autism 



We are deeply indebted to anonymous reviewers for insightful comments on the first version of this paper. The neuropsychological assessment of L.E. was performed at the Laboratorio di Neuropsicologia of the Istituto di Scienze Neurologiche, Seconda Università di Napoli (Italy).


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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • Alessandro Iavarone
    • 1
    • 2
  • Maria Patruno
    • 1
    • 2
  • Filomena Galeone
    • 3
  • Sergio Chieffi
    • 4
  • Sergio Carlomagno
    • 5
    Email author
  1. 1.Laboratorio di Neuropsicologia, Divisione di Neurologia e Stroke UnitASL Napoli 1NapoliItaly
  2. 2.Dipartimento di PsicologiaSeconda Università di NapoliCasertaItaly
  3. 3.Dipartimento di GeriatriaASL Napoli 1NapoliItaly
  4. 4.Dipartimento di Medicina SperimentaleSeconda Università di NapoliCasertaItaly
  5. 5.Dipartimento di PsicologiaUniversità di TriesteTriesteItaly

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