DS6 becomes perfectionistic when every paper he gets back, without him putting in any effort, has a smiley and a comment such as "brilliant!" or "Perfect!". He is hesitant to take risks and do harder work because he would "blow his cover" and reveal himself as not being brilliant. So he declines that optional extra enrichment sheet in school. I recently met the mom of a gifted 7th grader who said she cheered when her son finally failed his first test!