Brief Report: Two Day-Date Processing Methods in an Autistic Savant Calendar Calculator

Area of Science:

• Neuroscience
• Cognitive Psychology
• Developmental Psychology

Background:

• Individuals with Asperger syndrome often exhibit unique cognitive profiles, including exceptional abilities in specific domains.
• Calendar calculation, or date computation, is a cognitive skill that has been studied in relation to memory and executive functions.

Observation:

• A 24-year-old male (FB) with Asperger syndrome displayed remarkable ability in determining the day of the week for dates spanning 40 years.
• FB achieved 98.2% accuracy, with performance varying based on temporal distance and direction (past vs. future).

Findings:

• FB's future date calculations relied on calendar regularities, showing slower responses for more distant dates.
• Past date calculations were primarily driven by personal memory retrieval, with no observed remoteness effect.
• This case reveals two distinct day-date processing styles within a single individual.

Implications:

• Highlights the heterogeneity of cognitive strategies in individuals with Asperger syndrome.
• Offers new insights into the mechanisms of calendar calculation and date processing.
• Contributes to the understanding of memory retrieval and rule-based processing in neurodevelopmental conditions.