Entity theorists tend to have been told that they did well when they have succeeded, and that they weren’t any good at something when they have failed. So a kid aces a math test, comes home, and hears “Wow, that’s my boy! As smart as they come!” Then, next week Johnny fails an English test and hears “What’s wrong with you? Can’t you read?” or “Your Mommy never liked reading either—obviously, it’s not your thing.”