Attention deficient disorder is an outdated term often used to describe attention deficient hyperactivity disorder, according to Healthline. The 2013 version of the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, redefined the diagnosis of ADHD by creating three types of the condition. The inattentive type of ADHD is what many people still refer to as ADD.
Inattentive ADHD refers to the inability of an adult or child to stay focused, Healthline reports. Those with inattentive ADHD may be forgetful or disorganized. They have trouble following instructions and frequently lose important things such as keys, a wallet or books.
The second type of ADHD, hyperactivity and impulsivity, describes behaviors such as the inability to sit still, play quietly or control fidgeting, Healthline explains. People with this type of ADHD may blurt out answers before questions are completed, talk excessively and constantly interrupt others. ADHD's third type, combination, refers to an individual who displays symptoms of both inattentive as well as hyperactivity and impulsivity types.
Symptoms of ADHD usually become more pronounced in unstructured settings, such as a playground or other social setting, Healthline states. Sometimes children outgrow the condition. Other issues, such as anxiety, depression or a learning disability can make symptoms worse.