Experienced Marijuana Consumers Exhibit Virtually No Change In Cognitive Task Performance After Smoking

Experienced marijuana consumers exhibit nominal changes in cognitive performance after inhaling cannabis, according to clinical trial data published online this week in the journal Pharmacology, Biochemistry, and Behavior.

Read the data

Investigators at Columbia University in New York and the San Francisco Brain Research Institute assessed acute marijuana-related effects on cognitive functioning in 24 volunteers who reported consuming the drug at least 24 times per week.

Researchers determined that participants’ overall performance accuracy on episodic memory and working memory tasks “was not significantly altered by marijuana.”

Authors concluded: “The present findings show that smoked marijuana produced minimal effects on episodic and spatial working memory of near-daily smokers. The overall response accuracy on the word recognition and working memory tasks was unaffected by marijuana, although smoked marijuana did increase the amount of time participants needed to complete these tasks.

“This pattern of effects is consistent with results previously reported by other researchers studying the acute effects of marijuana on cognitive performance of regular users. … The finding … stands in contrast to previous findings in occasional smokers who showed reduced accuracy on these same tasks after marijuana. … The observation that frequent users’ response accuracy is not altered after marijuana smoking to the same extent it is for infrequent users … suggests that near-daily marijuana smokers may have developed tolerance to some marijuana-related behavioral effects.”

For more information, please contact Paul Armentano, NORML Deputy Director, at: [email protected] Full text of the study, “Neurophysiological and cognitive effects of smoked marijuana in frequent users,” will appear in Pharmacology, Biochemistry, and Behavior.

– Article from NORML.

Comments

27 Comments

  1. Anonymous on

    based on your own criteria, you must be the head narc
    as you babble cardboard shit as your response
    Must be these poisons holding your development back

  2. Anonymous on

    we don;t concern ourselves with what poisons you put into your body
    and you don;t concern yourself with the take down of the global drug trade

  3. Anonymous on

    so I propose a deal:

    We don;t concern ourselves
    with what you put into your body
    and you don’t concern yourself
    with the DEA destroying the
    global drug trade.

    everybody happy now?

  4. Anonymous on

    Ask The Prince of Pot how the war of drugs is going,
    and especially ask him about the legal shift in your favor

    maybe enclose a hacksaw blade

  5. Anonymous on

    Cannabis and addiction in the same sentence? hhmmm that doesn’t make sense. Cannabis is not physically addicting, read up some time and study before making ignorant statements that to the “stupid bus” riding people would be construed as an oxy moron!
    Drug laws are changing in our favor; it’s changing everyday!

  6. Anonymous on

    Cannabis and addiction in the same sentence? hhmmm that doesn’t make sense. Cannabis is not physically addicting, read up some time and study before making ignorant statements that to the “stupid bus” riding people would be construed as an oxy moron!
    Drug laws are changing in our favor; it’s changing everyday!

  7. Kelly L White on

    Your broken watch analogy fails. For too long you people have put it out that you have the solution to the problem- there never was a problem, bigotry, racism and hate brought about these intolerably bad drug laws and propaganda seeded and grew the opinions. You people, look at what you have reaped- look at the violence and the criminality and consider yourselves to be the broken ones. We already do- but unlike you, we won’t jail you, just offer you a joint and a chance at some peace.
    2012- Time for the pagan revolution.

  8. Samson on

    I also think it’s B.S. that they want to restrict sales of Cannabis to 1 Oz. at a time…..but anyone can go to a liquirstore and buy enough booze to kill themselves and at least five other people. WTF!!! Does not make sense….

    P.S. and don’t get me started on prescription/over the counter drugs vs. medical MJ.

  9. *serge on

    i like your comment thank you

  10. MOTFA on

    Thanks for the links. That zoning crap is irrational.
    If they want to get serious about zoning they would have to do it to tobacco and liquor too. But, god forbid anyone should have to walk more than a block to get knee walking drunk.

    Total b.s.

  11. MOTFA on

    If you are talking about me, I was using sarcasm.

  12. Anonymous on

    This looks like the work of a troll posting yesterday, who also got poison confused with Cannabinoids. Maybe spend some time looking into toxins and non-toxins, it might sort out some of your confusion from post to post, day by day…

  13. MOTFA on

    Why are so concerned that i am poisoning myself. It’s my business what i decide to put in my body. Man i could really go for a big mac right now.
    Also, why are you concerned that no one respects us?

    Oh wow. Let me guess. Jesus, you have returned!
    Can you do me a favor? Tell my grandfather i need to know where he left the keys to the old chevy.

  14. ray christl THC Media Asia on

    Thanks for all your hard work Paul,and all the brilliant folks at NORML-MPP-et.al.. David Borden’s recent study report on Huff Post (posted on CC also),was largely ignored. The people with college education and liberal bent want to comment on Two-headed cow from Egypt–Lindsey Lohan and Mel Gibson.I’ll take Paul Armentano.David Borden,Allen St.Pierre and those young guys at MPP.We have the science,solutions,and the loving hearts to reform our social order. Don’t let the “appeal to emotion” from trolling BUSH-DEA waste your time.Educate the uninformed,both young and old. ONELOVE

  15. canuck on

    “Investigators at Columbia University in New York and the San Francisco Brain Research Institute ”

    Article. By NORML.

    If you say something disrespectful, inaccurate or uncalled for expect to be bashed by many.

    I encourage you to watch the 50 quotes. All of your heros are stoners.

  16. Anonymous on

    Exactly! You don’t want to debate anything or learn anything or make any valid points your just a Narco-agent having a good timer bashing smokers. Besides you never present any factual truth in your comments just crap that I would expect any Narc to say… As for the comment of slowly poisoning the body…Hope you don”t drink anything with caffeine, don’t use toothpaste, don’t drink tap water, don’t take aspirin, don’t live in a big city etc. You are the one who needs to leave in the Real world, humans poison themselves and the world every minute of the day and there are much worse poisons than pot…like being a Narc.

  17. Anonymous on

    Thats exactly what the”stoners” said…so why does the first post call into question the validity of the study. The point is that NORML just reported it so why would Columbia University have an interest in lying or manipulate the facts toward a pro-pot agenda.

  18. Anonymous on

    it says reported by NORML- not prepared by or commissioned by or conducted by

    you stupid stoners
    can’t read or understand English as your _first language
    then get all worked up about nothing
    make up a pile of fictional crap
    always drag in your fantasy Gestapo fears
    and froth like a frig in a toilet when somebody lifts your lid
    no wonder nobody respects you
    you are brain damaged morons
    and don;t even know you are slowly poisoning yourselves
    keep away from normal people till the fences are up, OK?

  19. Anonymous on

    make a note of that

  20. Anonymous on

    Thank you for proving me right!!! You couldn’t answer any of the question only say I “ride the stupid bus”. Oh and heres your gesture “mr.stupider”; 14 states allow Medical Marijuana and legalization is to be on 2 state ballots. So how’s that for a gesture of condonation. By the way, Portugal decriminalized ALL DRUGs and they have half the drug use, twice the amount of people who seek voluntary treatment and a quarter of the crime. So say what you will you Narcotics agent…there will be a special place for people like you in the after life. After all, when the Germans SS and gestapo had to imprison and kill their fellow germans they were “just doing there job”. Remember these are humans you are talking about REAL PEOPLE…But I know you are one of those people that give a child molester 7 years in prison and someone who smoke a plant 8 years… happens all the time. P.s. its kind of hard to worry about addiction(1st when caffeine is more addictive) when you have Colon Cancer and you are battling for your life…so keeping riding the bus of ignorance and cold-heartedness…I hope you don’t get sick one day and need cannabis,b/c you might have to eat your words.

  21. Anonymous on

    ^^^

    the above is my response to the original poser… this is not a study done by NORML.

  22. Anonymous on

    “according to clinical trial data published online this week in the journal Pharmacology, Biochemistry, and Behavior.

    Investigators at Columbia University in New York and the San Francisco Brain Research Institute assessed acute marijuana-related effects on cognitive functioning in 24 volunteers who reported consuming the drug at least 24 times per week.”

    Sure sounds like bias to me….. maybe not.

  23. Anonymous on

    Let me know when the world condones your cannabis addiction
    or makes a single gesture towards changing the drug laws
    in your favor– like never, and you already suspect that
    Till then, you are a commuter riding on the stupid bus

  24. Anonymous on

    Its amazing how poor your analogies are…a broken watch really??? I would like to point out that NORML did not conduct the study merely reported it. And it is apparent from your use of the non-word “stupider” that maybe you have been catching a contact…Oh wait let me guess your a pig…why else would you visit this site regularly to bash people that believe and understand things you do not want to understand or are not able too. Ps. NORML does not promote the legalizaton of all drugs just marijuana. Almost all famous musicians including all the ones you probably listen to smoke or have smoked marijuana…what does that say about them? Or our presidents?Or all the other extremely successful people that are far more intelligent than you that smoke marijuana? What will it take for people like you too understand…must Jesus himself come down from the heavens and verbally condone its use? Would that suffice? Either way, marijuana will be legal in this country and you are already surrounded by “super stoners” so live with it they are not hurting you. I am confident that you will make no intelligent defense or your arguments or your statements, you will just seek to immaturely call names. Stupider LOL

  25. Anonymous on

    a broken watch doesn;t lose any more time than it already did
    a super stoner can’t get much stupider than they already are

    this is a study reported by NORML-
    the National Organization to Reform marijuana laws
    and its one more piece of questionable evidence
    to show how drugs don;t .. uh.. well, uh,, they sort of do but
    … well hardly… uh well.. its all just a prohibitionist lie