I wanted to pass along this article from US News & World Report on diagnosing ADHD in your preschooler:
Sarah O'Neill, of City University of New York, and colleagues followed 104 hyperactive and/or inattentive 3- and 4-year-old children for two years. Their behavior was rated by their parents and teachers, as well as clinicians who conducted psychological tests on the children.
By the time children reached age 6, nearly 54 percent had been diagnosed with ADHD. A child's likelihood of such a diagnosis was higher when parents, teaches and clinicians all rated the child as having high levels of inattention or hyperactivity at age 3 or 4, according to the study in the October issue of the Journal of Abnormal Child Psychology.
Parents' reports were critical, particularly combined with either teacher or clinician reports, according to a journal news release. Teacher reports alone were not as useful.
How was your preschooler diagnosed? If you haven't gotten a formal diagnosis yet, what traits are you seeing that makes you think they are ADHD?