Yes, it is certainly possible. What you describe appears to be a typical delay discounting procedure, several of which are available from the Task Library (cf. http://www.millisecond.com/download/library/DelayDiscountingTask/).
I am interested in programing an automatically adjusting procedure. For example, I would pose a question "Would you rather have $50 now or $100 in a week." If $100 in a week is chosen, the now amount is adjusted by a specific percentage for the following question. Is this at all possible without having to write all the possible pathways using the branching command? Thank you!
Brady