I’ve interviewed and have been hired by numerous companies. Hasbro, Hallmark, Philadelphia Chewing Gum, K’NEX, Siemens, etc… and I NEVER had to go in and “prove” myself beforehand. I would think that a resume and portfolio that shows what I’ve done and what I can do should be enough to show potential employers that I’m worthy to be offered a job. Sure, if I was a fresh graduate from an Art School or college, with nothing but school projects in his portfolio asking me to show that I’m responsible enough to handle the position makes some sense, but for me? At my age? With my experience? NOW?