A learning disability is a disorder that affects one or more basic psychological processes involved in understanding or using spoken or written language. It can manifest as difficulties with listening, thinking, speaking, reading, writing, spelling, or math. Common causes include genetics, problems during pregnancy/birth, brain injuries, and environmental factors like poor early education. Learning disabilities are diagnosed by comparing IQ and achievement test scores - a significant discrepancy indicates a learning disability. Specific types of learning disabilities include dyslexia, dysgraphia, dyscalculia, and others related to language, motor skills, sensory processing and more.