It all amounts to "Would I like to work with this person?", but a couple of things. Persistence, memory, ability to learn -- not trying the same thing over agai

It all amounts to "Would I like to work with this person?", but a couple of things. Persistence, memory, ability to learn -- not trying the same thing over again if it doesn't work -- intelligence when possible, knowledge if I expect them to have it. That's pretty vague. I use the same strategy as the sibling post, ratcheting up difficulty until the candidate fails, so I usually have a lot to go on, but the exact criteria end up changing from one interview to the next depending on what the candidate did. Occasionally I end up with not enough data. I try to give my feedback in the form of a confidence interval, but if it's mediocre candidate combined with not-stellar signal quality... figuring out how to score them can take a while.