I mean, if you had to work in a team with someone.. this sounds like a good way to see how they'd fit in actually working in team under a pressured situation.

You're not labelling them as this or that, or necessarily checking for 'hidden indications' that they could have some condition you know nothing about, it's just finding people that fit into the culture that you're looking to fill.

I (probably awful) analogy could be, if I go to car boot (garage) sale and find things that are good value (and/or haggle).. I'm not telling the person how much the item's worth, but what price it's worth to me/what I can afford.. I'm not claiming to be a antique evaluator.

(Update: Well, I guess I don't _actually_ know they're doing/not doing, but it's my interpretation)