Attention-deficit hyperactivity disorder (ADHD) is believed to be neurologically based and characterized by enduring attentional problems, motor restlessness, and cognitive and motor impulsivity that impact one's ability to function optimally in daily life activities. ADHD is commonly diagnosed in childhood at a prevalence rate of 11% and a male to female ratio of 3:1. The prevalence of adult ADHD varies from 4 to 6% and it is estimated that two-thirds of adult ADHD disorders are extensions of childhood ADHD. Researchers have suggested that the male to female prevalence ratio is inaccurate and that females experience ADHD at similar levels to males but are underdiagnosed. While boys with ADHD are often identified by their teachers because of motor impulsivity and inattention, girls with ADHD who may experience attentional problems and impulsivity without significant hyperactivity, may fail to be identified by teachers as needing evaluation and treatment. Some studies have found that female children and adolescents who experience the ADHD symptoms of inattention, disorganization, poor time management, and distractibility are more likely to be misdiagnosed with depression and anxiety. When depression and anxiety occur in children and adolescents with undiagnosed ADHD symptoms, they may result from the inability to manage ADHD symptoms as they impact functional performance in the home, school, and community.