A study in the US: families had moved to better housing and the children were assessed for ADHD—attention deficit hyperactivity disorder (多動癥).

Because children's brain and behavioral disorders, like hyperactivity and lower grades, can also be linked to social and genetic factors, it's tough to pin them on exposure to specific chemicals with solid 33 statistical evidence, which is what the EPA re

The children we identified as having attention difficulties were not diagnosed with attention deficit hyperactivity disorder (注意力缺乏多動癥, ADHD), although some may have had the disorder.