Table 1.

Activities and behavioral change techniques for section 1 (preparing for change).

Module and activities				Behavioral change techniquesa
Section 1 (preparing for change)
	1. Introduction
		Complete cannabis use diary Select personal reasons for changing cannabis use Read about prevalence of cannabis use and CUDb	Self-monitoring of behavior Social, personal, and emotional consequences (MIc) Normative feedback Provide contingent rewards (badge)
	2. Cannabis dependence
		Read information about CUD Self-assessment of severity of dependence	Provide information on consequences Monitoring with awareness or feedback on behavior
	3. Cannabis myths
		Evaluate knowledge about health effects of cannabis consumption Self-assessment of cannabis use consequences	Provide information about behavior-health link Health, social, and emotional consequences or monitoring with awareness (MI)
	4. Benefits of reducing
		Select perceived benefits (eg, social, cognitive, and emotional) of decreasing cannabis use Prioritize these benefits	Prompt positive self-talk MI (preparatory change talk)
	5. Believe in your strengths
		Self-evaluate psychological strengths (eg, wisdom, bravery, and moderation) Read a personalized feedback based on their strengths	Focus on past success Mental rehearsal of successful performance Prompt self-talk MI (preparatory change talk)
	6. Triggers
		Identify personal cannabis consumption triggers (eg, social, activities, and emotional) Select the most important triggers Read strategies about dealing with triggers	Provide information Avoiding or changing exposure to cues for the behavior Monitoring with awareness or relapse prevention Provide contingent rewards (badge)
	7. Withdrawal
		Watch an educational video about withdrawal symptoms Select experienced withdrawal symptoms Identify preferred coping strategies	Provide information Skills training with focus on withdrawal symptoms Monitoring with awareness or relapse prevention Prompt behavioral practice
	8. Craving
		Watch an educational video about craving symptoms Select experienced craving symptoms Read craving coping strategies Identify preferred coping strategies	Provide information Skills training with focus on craving symptoms Monitoring with awareness or relapse prevention Prompt behavioral practice
	9. Cannabis and psychosis
		Education about cannabis and medication in psychosis Watch 2 video testimonials about the effects of cannabis in psychosis Report their perceptions related to the effects of cannabis on psychotic symptoms Identify preferred psychotic symptoms coping strategies	Provide information Social comparison Monitoring with awareness Prompt behavioral practice
	10. Choose a cannabis use goal
		Read a summary of all reasons and capacities of changing Chose a cannabis use goal: stop, decrease, or maintain current use Decide on a plan to reduce or stop cannabis use (eg, date) Select cannabis harm reduction strategies	MI Prompt cannabis use goal setting or action planning and commitment Provide general encouragement Provide contingent rewards (badge)
	Supplementary module: return to objective
		Follow-up on their objective defined in module 10. This module can be offered for a maximum of 2 times once participants start section 2.	Prompt barrier identification Relapse prevention Provide general encouragement Prompt review of behavioral goals

^aCorresponding to the taxonomy of behavior change techniques published by Abraham and Michie [49] and Michie et al [50].

^bCUD: cannabis use disorder.

^cMI: motivational interviewing.