Modern Parenting Books Harp on Praising Effort, Not Ability

Modern parenting books always harp on praising effort, not ability. If your kid comes home and they got a good grain on atas, our natural inclination seems to be to say something like, o good job. But that's kind of harmful, right? Because it implies that they just hav this natural thing that they're smart. San rigt ten, so if it fails you and leaves you high and dry.