From what I can find, I have to say that the claim “Adolescent use of marijuana can cause a lack of prefrontal cortex development” is true. First, taking a look at the source provided, the evidence comes from the Brain and Behavior Research Foundation. This is a credible source, as backed up by the National Library of Medicine, “One is that scientific competence in the organization…has always resided in a Scientific Council composed of leaders in the field.” “The Council has sought to support the best research, no matter who is doing it or where it is being done.” Next, I took a look at the author of the article. According to Vermont Brain Health & Wellbeing, Matthew D. Albaugh is a licensed clinical psychologist, has a doctorate in clinical psychology from the University of Vermont, and even completed an additional four years of postdoctoral training in the Department of Psychiatry at the University of Vermont Larner College of Medicine, so I would say he’s pretty reliable.
After a bit more research, I came across an article from PNAS, the Proceedings of the National Academy of Sciences. It states how a developmental neuroscientist, Kuei Y. Tseng, did a study where he investigated how rats respond to THC. “He’s found that exposure to THC or similar molecules during a specific window of adolescence delays maturation of the prefrontal cortex (PFC), a region involved in complex behaviors and decision making.” So I did some more research on Kuei Y. Tseng just to make sure, and I found out that he has a MD and PhD in physiology and neuroscience, and he’s a postdoctoral scholar in Neuropharmacology and Neuroscience, according to his LinkedIn, so I’d say he’s also pretty reliable.
I did some more research just to back the claim up a bit more, and I found an article from AmericanAddictionCenters. This organization has been accredited by the Better Business Bureau, so we know it's reliable. It states how chronic and early cannabis use can cause several adverse effects on an individual, such as “Cognitive problems, such as problems with attention, concentration, problem-solving, learning, and memory. Reduced coordination and reaction time. Performance issues at school or work. Poor decision-making and judgement.” etc. So, I full heartedly agree that this claim is true.