Refining the marijuana purchase task Using qualitative methods to inform measure development.
Behavioral economic demand for cannabis (i.e., relative reinforcing value) can be measured via marijuana purchase tasks (MPTs). However, commodity ambiguities pose challenges and design concerns exist regarding current MPTs. The aim of this 2-phase study was to modify and improve a MPT using qualitative methods. Phase I Focus groups were conducted with regular (i.e., average use ≥ onceweek) cannabis users (