"Although a large percentage of this group fails to complete high school and can often achieve only a low socioeconomic status, most adults in this group blend in with the rest of the population.According to the DSM-5, differentiating borderline intellectual functioning and mild intellectual disability requires careful assessment of adaptive and intellectual functions and their variations, especially in the presence of co-morbid psychiatric disorders that may affect patient compliance with standardized test (for example, attention deficit hyperactivity disorder (ADHD) with severe impulsivity or schizophrenia).