How we communicate – our body language, tone, expression – says just as much as our words. This study compares how people with different backgrounds and medical conditions use language and non-verbal methods to interact. We are looking for children between the ages of 12 and 17 to participate along with their parents. Typically developing children as well as children who are diagnosed with ADHD, Anxiety Disorder, Autism, Bipolar Disorder, Depression, or Oppositional Defiant Disorder are invited to participate and will be asked to play games and talk with our research staff. The study also includes a full psychological evaluation by a CHOP expert as well as IQ screening and clinical feedback and guidance, free of charge. Participants will be compensated for their time and travel.