Thank you for participating in this study!
​Your participation is vital to our efforts to learn about what impacts California's marijuana policies have on young adult use of marijuana and other drugs.

​Check out where in LA County our participants are from!

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See how your contributions are impacting our project!

Visit our FAQs page for frequently asked questions

If you are a participant in this study and your contact information has changed or you have a question about anything study-related, please contact your research associate or the project coordinator:

​Alisha Osornio | Interviewer
Email: aosornio@chla.usc.edu
Cell:  (323) 369-9021

Susie Choi | Interviewer
Email: suchoi@chla.usc.edu
​Cell: (323) 217-4220

Meagan Suen | Project Coordinator
Email: msuen@chla.usc.edu
​Cell: (323) 217-7622

Or contact us at ChayaStudy@chla.usc.edu and a member of our team will get back to you as soon as possible! 

* Please Note: Your message and feedback is very important to us! If contacting our team over the weekend, please allow us 24-48 hours to get back to you.

Check out our social media accounts for more updates and recruitment locations near you! 

What wave of data collection am I currently in? 

If you are a participant in our Parent Cohort (i.e., you were recruited for this study in 2014-2015): You are in WAVE 8 of data collection

If you are a participant in Renewal Cohort (i.e., you were recruited for this study in 2019-2020): You are in WAVE 4 of data collection