(Willie B. Thomas/DigitalVision/Getty Images) A long-term study of more than 11,000 children and teens has linked ...

Teenagers who started using weed had slower gains in thinking and memory skills as they grew, researchers report today in the ...

Teen cannabis use linked to slower gains in memory and focus - The brain is only about 80% developed in adolescence ...

Researchers observed slower gains in cognitive tests that measured memory, focus and thinking speed among middle and high ...

Researchers from University of California San Diego have found that teenagers who begin using cannabis show slower gains in ...

New research has found that teenagers who use cannabis may experience slower gains in thinking and memory skills as they grow ...

Sara Ruiz/ / Getty Images/iStockphoto Teens who start using cannabis before age 15 are more likely to use the drug often later in their lives. They are also more likely to develop mental and physical ...

For decades, my colleagues and I advanced the premise that early substance use—nicotine, alcohol, or cannabis (or other addicting drugs)—interferes with critical maturation stages, particularly ...