The connection between omega-3 fatty acids (including those found in fish oil) and neuropsychiatric health is supported by a wide range of research. Polyunsaturated fatty acids, a group that includes omega-3s, were investigated in a 2002 study. Parents of the children taking the supplement reported beneficial outcomes, especially in terms of behavior. Children were reported to have improved attention in class and be more cooperative, while the frequency of disruptive behavior decreased. In 2004, another team of researchers looked at whether docosahexaenoic acid (DHA) supplements in particular could help treat ADHD in children. Their findings showed that supplementation led to improvement in visual short-term memory and in the ability to perform a task continuously over time compared to those children who did not receive the supplements. A 2005 study suggested that adding fish oil supplements to patients' diets did indeed improve ADHD symptoms. Specifically, arachidonic acid and EPA were found to be effective.