ADHD involves distorted behavior or thought patterns like constant activity, fidgeting or inability to concentrate. Symptoms may include repetition of certain words or actions.
Depression is a mental disorder marked by mood distortions like anger, sadness, and despair.
Psychosis is a generic word that describes a loss of touch with reality. Many different conditions can influence it.
Remember, a diagnosis does not define a person. Avoid stigmatizing the person by using terms or phrases that characterize the person by what makes them different. Never call someone with a mental health issue crazy, nuts or psycho.