Attention deficit hyperactivity disorder (ADHD) is one of the most common behavioural disorders of childhood. This paper reviews significant research findings on twin studies looking at heritability and environmental effects on ADHD in twin pairs and non-twin pair siblings. It concludes that ADHD is greatly heritable and pharmacological interventions are warranted along with behavioural interventions.
"Each subtype of ADHD has its own distinctions. Children who are hyperactive tend to be in constant motion and report needing to stay busy (ADHD, n.d.). Impulsive children tend to act hastily and are unable to control their immediate reactions. They often speak out or act out without thinking first about their actions (ADHD, n.d.). Inattentive children are diagnosed the least. They are often the least disruptive in a school setting (ADHD, n.d.). These children are not impulsive or hyperactive, yet have a difficult time paying attention and thus have trouble processing information (ADHD, n.d.). Laboratory and imaging tests are unable, at this time, to diagnose a child as having ADHD (Jaffe & de Benedictis, 2006). "
Genetics, Environment and ADHD (2012, January 15). Retrieved February 13, 2012, from http://www.academon.ca/Research-Paper-Genetics-Environment-and-ADHD/75190