Savant skills in autism: psychometric approaches and parental reports

Patricia Howlin, Susan Goode, Jane Hutton, Michael Rutter

Research output: Contribution to journalConference paperpeer-review

126 Citations (Scopus)

Abstract

Most investigations of savant skills in autism are based on individual case reports. The present study investigated rates and types of savant skills in 137 individuals with autism (mean age 24 years). Intellectual ability ranged from severe intellectual impairment to superior functioning. Savant skills were judged from parental reports and specified as 'an outstanding skill/knowledge clearly above participant's general level of ability and above the population norm'. A comparable definition of exceptional cognitive skills was applied to Wechsler test scores-requiring a subtest score at least 1 standard deviation above general population norms and 2 standard deviations above the participant's own mean subtest score. Thirty-nine participants (28.5%) met criteria for either a savant skill or an exceptional cognitive skill: 15 for an outstanding cognitive skill (most commonly block design); 16 for a savant skill based on parental report (mostly mathematical/calculating abilities); 8 met criteria for both a cognitive and parental rated savant skill. One-third of males showed some form of outstanding ability compared with 19 per cent of females. No individual with a non-verbal IQ below 50 met criteria for a savant skill and, contrary to some earlier hypotheses, there was no indication that individuals with higher rates of stereotyped behaviours/interests were more likely to demonstrate savant skills.
Original languageEnglish
Pages (from-to)1359 - 1367
Number of pages9
JournalPhilosophical Transactions of the Royal Society of London Series B: Biological Sciences
Volume364
Issue number1522
DOIs
Publication statusPublished - 2009
EventJoint Discussion Meeting of the Royal-Society/British Academy on Autism and Talent - London, ENGLAND
Duration: 1 Jan 2008 → …

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