> otherwise why would they be mostly calibrated in the downwards direction? Who do you think pays for these things? I always assumed it was because there are p

> otherwise why would they be mostly calibrated in the downwards direction? Who do you think pays for these things? I always assumed it was because there are people born with impaired intellectual abilities, and having some measure of how impaired they are would be significant for things like edibility for benefits and management of their condition (e.g. goals for the school system).