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Published online August 3, 2007, 10.1101/lm.653607
 LEARNING & MEMORY 14:533-538
©2007 by Cold Spring Harbor Laboratory Press; ISSN 1072-0502/07 $5.00
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Research
An analysis of calendar performance in two autistic calendar savants

Daniel P. Kennedy1 and Larry R. Squire1,2,3,4

1 Department of Neurosciences, University of California—San Diego, La Jolla, California 92093, USA; 2 Veterans Affairs Medical Center, San Diego, California 92161, USA; 3 Departments of Psychiatry and Psychology, University of California—San Diego, La Jolla, California 92093, USA

We acquired large data sets of calendar performance from two autistic calendar savants, DG and RN. An analysis of their errors and reaction times revealed that (1) both individuals had knowledge of calendar information from a limited range of years; (2) there was no evidence for the use of memorized anchor dates that could, by virtue of counting away from the anchors, allow correct responses to questions about other dates; and (3) the two individuals differed in their calendar knowledge, as well as in their ability to perform secondary tasks in which calendar knowledge was assessed indirectly. In view of the fact that there are only 14 possible annual calendars, we suggest that both savants worked by memorizing these 14 possible calendar arrangements.

Received May 29, 2007; accepted in revised form June 30, 2007.

4 Corresponding author.

E-mail lsquire{at}ucsd.edu; fax (858) 552-7457.

Article is online at http://www.learnmem.org/cgi/doi/10.1101/lm.653607


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