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Idiot savant calendrical calculators: maths or memory?

N O'Connor, B Hermelin

    Psychological Medicine
    |November 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

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    Idiot savant calendrical calculators showed slower response times and more errors for dates further from the study year. Memory alone may not explain their remarkable calendar calculation abilities.

    Area of Science:

    • Cognitive Psychology
    • Neuroscience
    • Developmental Psychology

    Background:

    • Idiot savant syndrome is a rare condition where individuals with significant developmental disabilities exhibit extraordinary abilities in specific areas.
    • Calendrical calculation, the ability to determine the day of the week for any given date, is a frequently observed savant skill.

    Purpose of the Study:

    • To investigate the performance of idiot savant calendrical calculators across different time periods.
    • To explore the relationship between response speed, accuracy, and proximity to the study year.
    • To assess the role of memory in calendrical calculation abilities.

    Main Methods:

    • Eight individuals with diagnosed idiot savant calendrical calculation abilities were tested.
    • Participants were asked to determine the day of the week for specific dates in 1963, 1973, 1983, 1986, and 1993.

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  • Response times and accuracy were recorded during the study conducted in 1983.

    • Main Results:

    • Response speeds were slowest for dates in 1983, increasing significantly for dates further in the past and future.
    • An increase in response time correlated with a rise in calculation errors.
    • No significant correlation was found between response speed and measured IQ, though sample size limited definitive conclusions.

    Conclusions:

    • The performance of idiot savant calendrical calculators is influenced by the temporal distance of the date from the present.
    • Memory alone is insufficient to account for the observed calendrical calculation performance.
    • Further research is needed to fully understand the cognitive mechanisms underlying savant abilities.