Filled with current, practical, and useful information for professionals and individuals, this second edition summarizes the literature concerning ADHD across the lifespan. It offers a better understanding of the disorder by addressing the potential causes of ADHD, the developmental course, and numerous treatment approaches. The author delivers research-based, cutting-edge knowledge in a concise and user-friendly fashion. The book skillfully explains the scientific literature, often complex, concerning this disorder. Commonly asked questions are addressed, including: What causes ADHD? What does ADHD look like, and how can it be accurately assessed? How can ADHD be treated with and without medication? The author thoroughly tackles these question and more. The text contains helpful tables and appendices, as well as numerous up-to-date resources for readers who desire additional information about the disorder. "An ADHD Primer" is intended for students enrolled in teacher-certification programs, graduate students enrolled in research and applied training programs, educators, counselors, nurses, psychologists, parents, and individuals with ADHD. This book contains a foreword (R. Barkley); a preface; and the following five chapters: (1) Attention-Deficit/Hyperactivity Disorder--What Is It?; (2) ADHD--What Causes It?; (3) ADHD--How Is It Assessed?; and (5) ADHD--How Is It Treated? Medication and Alternative Approaches.