By Gillian Fournier

Decreased mathematical ability due either to a learning disorder or damage to the brain.

Example: A professor of mathematics, under treatment for brain trauma after a car accident, discovers he can no longer figure a fifteen percent tip.

Here is a great website that allows people to see a comprehensive list of all of the symptoms associated with dyscalculia, it also has treatment options and prevention methods: http://www.dyscalculia.org/calc.html

    Last reviewed: By John M. Grohol, Psy.D. on 18 Aug 2010