Three mechanisms (eidetic imagery, high-speed calculation, and
substitute compensation for normal learning) were investigated and rejected
as possible explanations for the calendar-calculating ability of a
particular idiot savant. Reaction times for calendar calculations indicated
that he used neither an idiosyncratic nor a calendar-based system. Rote
memory and a special ability to concentrate for extended periods of time
were postulated to explain this individual's performance.
Abstract Teaser