Question: What is (are) Learning Disabilities ?
Answer: Learning disabilities are disorders that affect the ability to understand or use spoken or written language, do mathematical calculations, coordinate movements, or direct attention. Although learning disabilities occur in very young children, the disorders are usually not recognized until the child reaches school age. Research shows that 8 to 10 percent of American children under 18 years of age have some type of learning disability.
Source: NINDS

Question: what research (or clinical trials) is being done for Learning Disabilities ?
Answer: The National Institute of Neurological Disorders and Stroke (NINDS) and other Institutes of the National Institutes of Health (NIH) support research learning disabilities through grants to major research institutions across the country. Current research avenues focus on developing techniques to diagnose and treat learning disabilities and increase understanding of their biological basis.
Source: NINDS