2. The device measures and self-report measures will directly correlate, as expected; ie: increased sleep and increased % of deep sleep will correlate with higher PSQI scores. When participants are using baseline levels of cannabis or are in cannabis withdrawal, they will have device measures consistent with negative health behaviors (poor sleep, decreased activity, increased stress). When they reduce cannabis use or achieve abstinence for a sustained period (any 14 days), an association with positive health behaviors as measured by the mobile device (adequate sleep, adequate activity, decreased stress) will increase.