The CanCope intervention was delivered through the MetricWire app which was available to each participant on their personal smartphone. The intervention included a "push" component which was responsive to a participant's level of craving (based on self-report assessed via EMA) and sent messages to each participant via the MetricWire app according to a decision rule. MetricWire randomized delivery of the push component with a probability of 0.33 for receiving a mindfulness coping strategy, 0.33 for receiving a distraction coping strategy, and 0.33 for receiving a thank-you message (attention control) at each decision point when participants were available for the intervention.

Messages prompted participants to use mindfulness-based or distraction-based coping strategies, or a thank-you message which served as an attention control. If participants reported elevated craving (4 or greater) prior to a decision point, they received either a coping strategy message or a control message. If participants reported craving levels of less than 4 they received a control message.

Participants were asked to rate their level of cannabis craving on a scale of 0 - 10 five times per day where higher scores indicate more craving. Participants were considered available for randomization when craving >=4 and they clicked the intervention message in the study app. To determine the effect of messaging on craving, we will calculate the average craving level for each EMA eligible for intervention and randomized to receive an active coping strategy message or a control message. It was pre-specified based on a priori power analyses for this small pilot study to combine the "mindfulness-based coping strategies" and "distraction-based coping strategies" interventions in the "Active Message" Row". Craving levels will be averaged across randomized observations. There were up to 140 decision points (5 EMAs per day x 28 days) per participant for the intervention period.

The CanCope intervention was delivered through the MetricWire app which was available to each participant on their personal smartphone. The intervention included a "push" component which was responsive to a participant's level of craving (based on self-report assessed via EMA) and sent messages to each participant via the MetricWire app according to a decision rule. MetricWire randomized delivery of the push component with a probability of 0.33 for receiving a mindfulness coping strategy, 0.33 for receiving a distraction coping strategy, and 0.33 for receiving a thank-you message (attention control) at each decision point when participants were available for the intervention.

CanCope: Messages prompted participants to use mindfulness-based or distraction-based coping strategies, or a thank-you message which served as an attention control. If participants reported elevated craving (4 or greater) prior to a decision point, they received either a coping strategy message or a control message. If participants reported craving levels of less than 4 they received a control message.

Participants were asked to rate their level of cannabis craving on a scale of 0 - 10 five times per day where higher scores indicate more craving. Participants were considered available for randomization when craving >=4 and they clicked the intervention message in the study app. To determine the effect of messaging on craving, we will calculate the average craving level for each EMA eligible for intervention and randomized to receive an active coping strategy message or a control message. It was pre-specified based on a priori power analyses for this small pilot study to combine the "mindfulness-based coping strategies" and "distraction-based coping strategies" interventions in the "Active Message" Row". Craving levels will be averaged across randomized observations. There were up to 140 decision points (5 EMAs per day x 28 days) per participant for the intervention period.

Only participants who completed baseline measures and at least one ecological momentary assessment (EMA) are included in the analyses. Two participants who completed baseline measures did not complete any EMAs which were required for micro-randomization and are therefore not included in the analyses.

The CanCope intervention was delivered through the MetricWire app which was available to each participant on their personal smartphone. The intervention included a "push" component which was responsive to a participant's level of craving (based on self-report assessed via EMA) and sent messages to each participant via the MetricWire app according to a decision rule. MetricWire randomized delivery of the push component with a probability of 0.33 for receiving a mindfulness coping strategy, 0.33 for receiving a distraction coping strategy, and 0.33 for receiving a thank-you message (attention control) at each decision point when participants were available for the intervention.

CanCope: Messages prompted participants to use mindfulness-based or distraction-based coping strategies, or a thank-you message which served as an attention control. If participants reported elevated craving (4 or greater) prior to a decision point, they received either a coping strategy message or a control message. If participants reported craving levels of less than 4 they received a control message.