Specific Retrieval Deficit from Long-Term Memory in Children with Poor Arithmetic Facts Abilities

Abstract: The most common characteristic of children with mathematical disorders is a difficulty in retrieving basic arithmetic facts. Different hypotheses about the underlying cause and the specificity of this deficit have been postulated. Some of them are general (such as low speed-of-processing or difficulties in retrieving semantic information from long-term memory), others are more specific (such as problems with material requiring verbal routines or a deficit in represent-ing or accessing arithmetic facts). To clarify this, children with poor arithmetic facts abilities (PoorAF) and control chil-dren of the same age performed five computerized tasks requiring the retrieval of information from long-term memory such as the product of multiplication facts, words semantically related to a target, objects functionally associated with a target, countries corresponding to a capital city presented as target, and the final word of incomplete French proverbs. In addition, a perceptual task was used as a measure of children’s processing speed. It was found that children with PoorAF were significantly slower than control children only in the arithmetic retrieval task. These findings support the hypothesis of a specific numerical deficit altering the retrieval of the arithmetic network from long-term memory