The parents of a 15-year-old female tenth grader believe that she should be doing better in high school, given how bright she seems and the fact that she received mostly A’s through eighth grade. Her papers are handed in late, and she makes careless mistakes on examinations. They have her tested, and the WAISIV results are as follows: Verbal IQ, 125; Perceptual Reasoning Index, 122; Full-Scale IQ, 123; Working Memory Index, 55th percentile; Processing Speed Index, 50th percentile. Weaknesses in executive function are noted. During a psychiatric evaluation, she reports a long history of failing to give close attention to details, difficulty sustaining attention while in class or doing homework, failing to finish chores and tasks, and significant difficulties with time management, planning, and organization. She is forgetful, often loses things, and is
easily distracted. She has no history of restlessness or impulsivity, and she is well liked by her peers. What is the most likely diagnosis?
Select one of the following: