My five-year-old DS just finished a gifted assessment. He had difficulty sitting still and concentrating. I sat in with him for they last part of his achievement test and noticed that he was not performing as well as he would at home. The psychologist's estimates of his scores were also lower than I had expected. He scored around the 95th percentile. This is a child who at the age of three asked me if language is symbolic. He has done numerous similar things. Tonight we were reading together and he flawlessly read sentences that were much harder than the ones he had stumbled over this morning during his assessment. When I complimented him on his reading he told me that it's a secret that he can read and that he only wants his dad and me to know. He has in the past expressed frustration that he is different from other kids and thinks differently than they do. Is it possible that he deliberately performed poorly?