I caught this term at a UX workshop recently, and jotted it down. A couple of weeks later, I can't find a reference for it - and I'm wondering if I misheard (miswrote?).
"Phased obligation", as I understood it, was the process of "not asking too much at any one time".
e.g: On a donation form, this might take the process of letting the user pick their donation amount on the first screen, then their personal details on the second, and their CC data on the third.
Is this "phased obligation"? If not, what's the correct term?