Report: Teens who smoke pot can damage memory, intelligence

Marijuana.

Teenagers who become hooked on cannabis before they reach 18 may be causing lasting damage to their intelligence, memory and attention, according to the results of a large, long-term study published yesterday.

Researchers from Britain and the United States found that persistent and dependent use of cannabis before the age of 18 may have a so-called neurotoxic effect, but heavy pot use after 18 appears to be less damaging to the brain.

Terrie Moffitt, a psychology and neuroscience professor at King’s College London’s Institute of Psychiatry, said the scope and length of the study, which involved more than 1,000 people followed up over 40 years, gave its findings added weight.

“It’s such a special study that I’m fairly confident cannabis is safe for over-18 brains, but risky for under-18 brains,” she said.

Before the age of 18, the brain is still being organized and remodeled to become more efficient and may be more vulnerable to damage from drugs, she added.

Moffitt worked with Madeleine Meier, a post-doctoral researcher at Duke University in the United States, to analyze data on 1,037 New Zealanders who took part in the study. About 96 percent of the original participants stuck with the study from 1972 to today, she said.

At age 38, all participants were given a battery of psychological tests to assess their memory, processing speed, reasoning and visual processing.

Those who had used pot persistently as teens scored significantly worse in most of the tests. Friends and relatives regularly interviewed as part of the study were more likely to report that the heavy cannabis users had attention and memory problems such as losing focus and forgetting to do tasks.



News
Entertainment
Sports
Lifestyle
National

Sprint and T-Mobile offer further price discounts

Sprint unveiled a plan on Thursday that gives subscribers access to unlimited data for $60 a month, the industry's cheapest unlimited data offering.

National

Hundreds pay it forward at Florida Starbucks in…

The spontaneous chain of kindness continued for about 11 hours, totaling 457 transactions by the time it ended.

National

Weather system east of Caribbean could turn into…

An area of low pressure located east of the Caribbean Sea has a 50 percent chance of becoming a tropical depression or storm in the next 48 hours, U.S. forecasters…

National

U.S. hospital to discharge doctor treated with experimental…

An American doctor who contracted Ebola treating victims of the deadly virus in Liberia has recovered and will be discharged on Thursday by the Atlanta hospital that treated him with…

Movies

Review: 'When the Game Stands Tall' is both…

The high school football saga "When the Game Stands Tall" fumbles around for a focus while Jim Caviezel offers the most low-key coach in history.

Movies

Girlfriend in a coma: Chloe Grace Moretz

Chloe Grace Moretz is the best cheerleader "If I Stay" could ask for. As the star of the film adaptation of the successful YA novel…

The Word

The Word: Summer lovin' for Zac Efron and…

Ah, the summer romance. So intense, so fleeting. With Labor Day fast approaching, it should come as little surprise that the incredibly surprising romance between…

The Word

The Word: The Zac Efron-Michelle Rodriguez summer fling…

  Ah, the summer romance. So intense, so fleeting. With Labor Day fast approaching, it should come as little surprise that the incredibly surprising romance…

NFL

Fantasy football draft guide: How to draft your…

Many are wondering if we’re entering a new age in fantasy football drafting — one where running backs take a backseat.

NFL

Jets vs. Giants: 3 Giants storylines to watch

The Giants have plenty to work on as they reach the dress rehearsal preseason game Friday night against the rival Jets.

NFL

Jets vs. Giants: 3 Jets storylines to watch

Metro looks at three Jets storylines to watch as they play the Giants Friday.

NFL

Giants expected to work Corey Washington into first-team…

The day of reckoning for the Giants' fringe players will fall upon them Friday night against the Jets.

Sex

Big weddings may lead to long-term happiness

Dreaming of a big wedding? A new study indicates that the longer your guest list, the happier you’ll be in the long run. l A…

Sex

Online dating for every generation

Frank Jackson and his mother Maggie are like lots of modern families: They have dinner together regularly, keep each other updated on their lives —…

Wellbeing

Going green could be the key to getting…

If we could just pursue the things that would actually make us happy, we could help the environment too, according to a New York researcher.…

Tech

Siren: A new dating app that puts women…

Online dating can be brutal, especially for single women. Noting that many women hate wading through inappropriate messages and photos, two tech entrepreneurs decided to…