Marcella receives psychological testing. Although her intelligence falls in the low average range, a discrepancy is still identified between her achievement and intelligence test scores. Her achievement falls significantly below expectations based on intelligence. This discrepancy will likely be the basis for a diagnosis of .

specific learning disorder

Explanation:

Specific learning disorder: In abnormal psychology, "specific learning disorder" is described as a comparatively new classification that tends to group together different "math-related" i.e, dyscalculia and "reading-related" i.e, dyslexia disorders comes under the same dimension.

If a child is experiencing specific learning disorder then the specific areas of his or her impairment are being explained as a part of the diagnosis.

Cause: Genetically inherited.

In the question above, the given statement signifies the specific learning disorder.