July is developmental disability awareness month. Developmental disabilities are a group of neurological or other impairments that can occur during childhood. These impairments can cause problems with learning, thinking, feeling and movement. Some common types of developmental disabilities include autism spectrum disorder, cerebral palsy, Down syndrome and attention deficit hyperactivity disorder (ADHD). According to the Centers for Disease Control and Prevention (CDC), about one in six children in the United States has a developmental disability.