ADHD may present differently at different ages and stages of an individual’s life. Children may experience more symptoms of hyperactivity and impulsivity, whereas adults may mostly experience symptoms of inattention.
Across the Lifespan
ADDitude has a great article that discusses the important considerations that should be made when considering an ADHD diagnosis for a preschool-aged child.
Information is presented from the National Institute of Mental Health's study on the combination of behavioural treatment and medication, and special considerations that should be made about medication in this age group.
The article by the American Psychological Association, discusses the issues that are involved when attempting to diagnose young children with ADHD.
Limitations of medication in this age group are also discussed.
In this video, Dr. Halperin provides a brief overview of the developmental differences seen in individuals with ADHD from early childhood into adulthood.